Error messages

Q. I get an error from the IIS when I try to open the daminion web access page. The error is the following:
CS0016: Cannot write the following: “c:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\daminion\c1e4c4c2\9dd32e5c\App_global.asax.pum7vdiu.dll” output file – „Access denied”.

A. Can you please go to this folder:
c:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files

Right click, go to Security tab and read/write permissions to IIS_WPG and NETWORK SERVICE users.

Please also grant permissions to C:\Windows\temp for these users
After that please restart Daminion Server.

You can also click on the Reinstall button in the Administration > Web-Access window
This is the ASP.NET access rights issue. More info about this issue:–could-not-write-to-output-file-microsoft-net-framework-v4-0-30319-temporary-asp-net-files


Q. Service cannot be started. System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. —> System.ArgumentException: The certificate ‘CN=localhost, OU=Debug,, S=Russia, C=RU’ must have a private key that is capable of key exchange. The process must have access rights for the private key. —> System.Security.Cryptography.CryptographicException: Keyset does not exist

A. If Daminion Server wasn’t launch in normal mode, and you see the info about certificate access issue please do the following steps:

– grant access rights for Daminion Server user to this folder:

– launch this command line for the Server version:
c:\Program Files (x86)\Daminion Software\Daminion Server\Daminion.Server.exe

Wait until it will be launched and close it

– Launch Daminion Server again from the admin panel


Q. We have recently received the attached error message while trying to access a server catalog in Daminion:
Error opening catalog. Time mismatch between Daminion Server PC and your PC! Server Time: … Client Time:…

A. The maximal time difference between Server and Client computers can be 10 mins. Please check also timezone settings on the server and client PCs. They should match if computers are in same office or home.


Daminion Server Questions

 Q. I am trying to upgrade to version 5.5 Server. Do I need to install it fresh or is there a way to update our current version?

A.  Upgrade path:

  1. Make sure that your maintenance is newer than Daminion version that you are trying to install;
  2. Download the latest Daminion Server 5.5 installer;
  3. Launch Admin Panel of your existing Daminion Server 5.0 version;
  4. Backup your existing catalogs (via Administration > Catalogs. Then right click and go to backup menu for each catalog in the list);
  5. Launch Daminion Server 5.5 installed on your server;
  6. Follow the screen instructions. Your 5.0 version of the server will be uninstalled automatically but all files, thumbnails, catalogs and settings will remain and 5.5 version will be installed.

You don’t need to install separately Daminion Clients 5.5 because they will be installed automatically on each client PC after an attempt to connect to Daminion Server.

Read this article about enabling web-access in the new Daminion version:

Q. Is it possible to access Daminion server via the Internet? 

A. Yep, there are multiple ways of how to do this:

1. Via VPN connection between remote computers and your office LAN
2. By installing Daminion Server (non-cloud) on your corporate web-server or a new web-server.
3. Via port forwarding on your company’s firewall
4. Via white IP address
5. Individual files and folders also can be shared via Dropbox Connector (named Publishing Panel in Daminion)

Q. Is it possible to easily add photos from a mobile phone?

A.  The easiest way to add photos into Daminion Server at the moment is via Dropbox:

  1. Install Dropbox on your server PC and on your mobile phone
  2. Import the Dropbox folder or its sub-folder into Daminion Server
  3. Mark this folder as Auto-Rescan

Now once you share any photo(s) via your mobile phone with Dropbox, it will be synced with
your Dropbox folder on the server PC and Daminion File Watching service will pick them up.


Q. Is it possible to install PostgreSQL  on a separate drive? 

A. Yep, you need download PostgreSQL and install it  separately.


Q. How to change the location of the PostgreSQL installation:

A. Refer the forum topic under this link 


Q. My login and password doesn’t pass verification and I can’t open my shared catalog


  1. Try to open this catalog from another computer. If you are able to do this, please check whether 8082 and 8084 ports are open in your client computer . If not, add these ports manually (Windows Firewall -> Advanced Settings -> Inbound Rules -> DaminionServerRules -> Protocols and Ports).
  2. The remote server and the client’s system time must be within (typically) 10 minutes of each other.  If they are not, security validation will fail.


Q. What is the best way to backup my Daminion Server?

A.  Here is the instruction of how to backup your Daminion Server database.

It’s recommended to add the “dump_postgresql.bat” file from the above zip archive into a scheduler of your third-party backup tool (we use free Cobian Backup).


Q. The option “Add Files” doesn’t work. Any ideas?

A. Open the catalog as LocalHost


Q. I have a dedicated drive that the catalog can be on, rather than running it of the OS drive (if that would give it better perfomrance). Can I move it somehow?

A. Follow the steps below:

  1.  Stop PostgreSQL and Daminion Server services from the “Services” window
  2.  Move C:\PosgtreSQL\Data to a new location
  3.  Launch Regedit. Locate this key:
    and specify a new PostgreSQL data location like this:

C:/Program Files (x86)/PostgreSQL/bin/pg_ctl.exe runservice -N “postgresql-9.2” -D “ANEWLOCATIONOFTHEDATAFOLDER” -w

Do not change any other part of the text except: ANEWLOCATIONOFTHEDATAFOLDER

4. Start Daminion Server again.


Q. How to migrate Daminion local catalogs to Daminion Server?

A. There are several ways to do this:

  1.  Open a shared catalog and go to the main menu: File > Import > Daminion Local Catalog (.dmc)
  2. Open local and shared catalogs in Daminion Standalone version. Select all files and navigate to Move To > Shared Catalog option from the context menu.
  3. Daminion can automatically sync all of your annotations (tags) into the file metadata (for JPEG, TIFF, PSD, PNG, etc…). So once the sync process is done, you can just import your images from local catalog to Daminion Server. All tags embedded into the metadata will be automatically extracted. (This way doesn’t work for some file formats, e.g. BMP).
  4. Via CSV. To get more information, please refer to the articles Exporting Metadata to CSV and Importing Metadata from CSV


Q. Is the in the roadmap off Daminion the posibility to store the data
in a MS SQL Database instead of a postgress database?

A. Nope, at the moment. We offer the easy-to-install and out-of-the box solution where all the necessary program components are included into the single package.

We started designing Daminion Server with possibility to use virtually any corporate level SQL Database, but focusing on a single database allowed us to reach the best performance, and it works for most of our customers. Plus it is free! So now Daminion is available in two editions:
-SQLite based (for local catalogs)
-PostgreSQL based (for shared catalogs).

Q. How to move a Server catalog to a new hard drive?

A. There are several ways to do this:

1. Create Symbolic Links to individual files or folders, and then these files or folders will appear like they are stored in the folder with the symbolic link even though the symbolic link only points to their real location. Follow this link to find a complete guide to symbolic links.

This way you can move your folders from drive #1 to drive #2, and leave just a small symbolic links on your drive #1. This is especially useful when your system drive is SSD with low capacity.

2. The second way is:

  • Backup your Daminion Server catalog(s)
  • Uninstall your PostgreSQL
  • Install PostgreSQL on another drive
  • Re-install your Daminion Server
  • Restore your Daminion Server catalog(s)


Q. How to migrate Daminion Server from one computer (PC1) to a new computer (PC2).

A. Please follow the steps below:

1. Launch the Daminion Server Administation panel on PC1
2. Go to the main menu, Administration > Catalogs… and backup all your catalogs
3. Install Daminion Server on PC2
4. Launch the Daminion Server Admin panel on PC2

Now we need to move all catalogs from Daminion Server on PC1 to Daminion Server on PC2. Repeat the below steps for
all catalogs on PC1:

5. Create a new catalog on PC2
6. Copy the catalog name from the first catalog on PC1
7. Adjust “Folder to Store Uploaded Files” and “Folder to Store thumbnails” paths or copy them from the first catalog on PC1 (check carefully user names)
8. Copy files from “Folder to Store Uploaded Files” folder on your PC1 to the “Folder to Store Uploaded Files” folder on your PC2
9. Copy files from “Folder to Store thumbnails” folder on your PC1 to the “Folder to Store thumbnails” folder on your PC2.
10. Restart Daminion server. Then right-click on a newly created catalog on PC2 and run “Restore…” command from the context menu. Specify a catalog backup that you did in the step 2. You also need to specify the _daminion##.backup file where information about Daminion users are stored, but you can do this only when restoring the first catalog only.
11. Repeat 5-10 steps for all catalogs on your PC1
12. Add a new Daminion Server address on your Daminion Clients. You can omit this step if a new PC2 name is the same as your PC1 name or has the same IP address (if you for example just upgraded the server).


Q. How to setup Daminion Server when working accross multiple offices?

A. Follow the instructions below:

  1. First of all you need to arrange a VPN connection between your offices. There are different (software and hardware) ways to arrange this:
  2. Then you need to download and install Daminion Server on your main office where your documents are located.
  3. After that install Daminion Client on a client computer (in this or remote office), launch it and go to the main menu: File > Open Shared Catalog. Press the “Add Daminion Server” button and type in the IP address of a computer where Daminion Server was installed. This IP will be different for computers in your main office and computers in other offices. Please consult your system administrator.
  4. Repeat the above step on all other clients. Please note that you need to install Daminion Client once. All further client software updates will be automatic.

The above steps are enough to start working with Daminion Server accross multiple office locations, however you can drastically increase the  speed of viewing and accessing original images if you do the following:

  1. Replicate a folder in your server computer in your main office with server computers in other offices by Windows DFS (Distributed File System). The replicated folder MUST be stored in the same location on all replicated computers. This allows you to make copies of your file server content in all offices.
  2. Launch Daminion Client, connect to your Daminion Server as admin, and go to the main menu: Catalog > Replication Settings and then check what group of user can take advantage of this option.

After that when a user from a remote computer double-clicks a photo in his Daminion Client, he will open the local file instead of downloading it from another office.


Q. In setting up multiple Libraries with multiple clients, is there some sort of config file that specifies UI layout?

A. There are several ways to edit default UI settings:

  1.  Part of the settings like a set of tags in the tags tree, thumbnail browser captions, and set of tags in the Properties panel are stored inside the catalog (server or local one). To set a default set of tags for all users you need to open a server catalog by Daminion client and go to the main menu:
    Catalog > Default View Settings…
  2. A list of catalogs can be adjusted by editing this file: C:\Users\USERNAME\AppData\Roaming\Daminion Software\Daminion\1.0\CatalogsStore.xml
  3. Other UI settings can be adjusted via this file: C:\Users\USERNAME\AppData\Roaming\Daminion Software\Daminion\1.0\Settings.xml
  4. In Daminion 5.0 version you can adjust default UI settings for all users via the Administration menu in your web-client.


Q: Does Daminion work with terminal services?

A: Yes, it does.


Q: Is it possible to use the existing MS-SQL-Server or MySQL with Daminion?

A: No. When installing Daminion Server, PostgreSQL is installed automatically as out-of-the-box solution.



Daminion Client Questions

Q. Export via email doesn’t see Outlook 2010. Is there a way to set up Outlook10 as a defaul account?

A. Go into ‘set your default programs’, select Outlook, and choose ‘set this program as default’ (even if it is already selected as the default).

Set Default Programs panel


Q. Is it possible to do a silent client setup for the Daminion Client?

A. Daminion Setup can be launched with /silent or /verysilent parameters.
For example:

DaminionSetup- /silent
DaminionSetup- /verysilent

With the version 5.0.1697 and higher, you can run a silent setup without opening desktop client applications when the installation is over. Please use the following command:

DaminionSetup- /verysilent/norun


Q. Daminion renders my RAW files uncorrectly.

A. Daminion extract built-in JPEG or PPM preview from RAW images in order to preview them. This is the only way to guarantee that you will see the same image in your RAW editing tool and Daminion. You can open your RAW files by your RAW editing tool, update it’s preview and then rebuild the thumbnail in Daminion (Ctrl + B).


Q. Import is very slow. What can I do to improve it?

A. Importing speed varies from many factors:

  • Whether you use local or server catalog (importing to server catalogs are up to 4-5 times faster)
  • Location of importing files (importing from network folders are slower)
  • Checked “Copy To” option in the import window also decreases the importing speed
  • Your PC configuration (free RAM/CPU)
  • Importing format and file size (importing of 5MP JPEGs are faster than 30MP TIFF files)
  • Active background processes. When syncing is turned On, it might impract to import speed.


Q. Is it possible to categorise more than 1000 items at a time?

A. Sure. There are several ways for doing this:

  • Increase a number of files per page via Edit > Preferences > General up to 5000 files per page.
  • Select all items in the current page (Ctrl + A). Then right click on a tag value that you want to assign to selected images and navigate to “Assign “TAG” to selected items“.

In this case the selected tag will be assigned to all found files instead of just 1000 images.


Q. I have a lot of duplicate files. Is there a way to find and automatically remove any and all duplicates?

A. You can find duplicate files via the Catalog > Find Duplicates menu. Daminion treats images as duplicates by comparing their visual part (thumbnails).
So for example 2 images with 100% identical visual parts but with different metadata block will be treated as duplicates.

Daminion can only find duplicates but can’t remove them automatically.
It’s very hard to determine automatically which file is original and which one is duplicate. So the duplicate removal operation is solely under a user responsibility.


Q. What is the maximum number of photos you can put into a catalog?

A. This depends on Daminion’s version:

  • All Daminion Server editions allows you to add unlimited number of files.
  • Daminion Standalone Pro – unlimited
  • Daminion Standalone Standard – 75 000 files per 1 catalog
  • Daminion Standalone Basuic – 25 000 files per 1 catalog
  • Daminion Standalone free – 15 000  per 1 catalog

More info about pricing you can get here (Server) and here (Standalone)


Q. I have created a standalone catalog. Can I then export this catalog into a shared catalogue?

A. Sure: File -> Import -> Daminion Local Catalog


Q. I need to move my Daminion .dmc Catalog to a new hard drive to free space on the current hard drive. What is the best practice when moving the local catalog?

A. There are 4 possible ways to move .dmc file:

Catalog .dmc file and imported files are stored in the same folder:

  • If you want to move both .dmc catalog file and imported files just copy this folder to a new location (it is possible thanks to support of relative file links).
  • If you want to move .dmc catalog file only, place it to the new location and relink the root file folder to change the relative file paths with absolute paths (don’t forget to move the Thumbs folder as well – it is stored in the same folder with Daminion .dmc catalog file

Catalog .dmc file and imported files are stored in different folders:

  • If you want to move both .dmc catalog file and imported files, place them in the new location and relink the root file folder (don’t forget the Thumbs folder)
  • If you want to move .dmc catalog file only, just place it and the thumbs folder in the new location.


Q. Is there a way to assign GPS coordinates to files that don’t have them?

A. Just drag images to the Map panel and sync tags with image metadata:

Manually: Item > Actions > Write Tags to File
Or Automatically: Turn the Sync option on (it is located near the export button on the toolbar).

Depending on your Writing Metadata preferenses (Edit > Preferences > Writing Metadata), GPS info will be written to the XMP section of theselected files, or to both XMP and EXIF.

For Server Catalogs the above mentioned Writing Metadata preferences should be adjusted via the Daminion Server admin panel.


Q. When I open my RAW files I can’t view them at 100%. The program shows that they are already at 100% but this isn’t the case. There are about half the size zoomed out. Why?

A. Daminion uses built-in JPEG previews inside the RAW images to display them. This is the only guaranteed way that you will see the same picture in both programs: Daminion and your Camera RAW editing program. Different RAW editors might display the same RAW image differently.

When taking photos some digital cameras write half size JPEG previews into RAW files. You can adjust your RAW editing program so they will generate and write full-size JPEGs inside your RAWs and then you can view them at 100% within Daminion.


Q. I receive the Time Mismatch between Client and Server message. What does it mean?

A. The time difference between S and C should be less than 10 mins.
Check also HyperV – time sync service that prevents from changing your server date.


Q. I would like to know why my Daminion version is no more a pro version?

A. It seems that you upgraded your Daminion to a new version that was released after your maintenance period ended.

You can follow one of these ways:

  • Revert back to your older Daminion version and restore your catalog from automatically backup files in the same folder where your catalog files are stored.
  • Prolong your maintenance with 50% discount, restore your Daminion Pro license status and get rights to update to any Daminion release during next 1 year.


Q: Any plans for a Mac client?

A: No, but we are planning to keep on developing Web-Client with the same functionality as Daminion Desktop client and accessible from Macs.

Apart from it, you can run Windows on Mac with Parallels Desktop software and install Daminion there.


Q.  I want to move all of the image files already cataloged by Daminion to a different drive, in order to free space on my master drive. Is there a way I can edit the path of each file within Daminion please?

A. No need to edit the path of each single file. Just move the parent folder with all sub-folders to a different drive and then relink this parent folder: right-click the folder > Relink Folder> specify the current path.