====== 4.3.1. Fat Client ======
===== 4.3.1.1. Fix for fatclient error on startup =====
**Issue** \\
When starting the fatclient/simulator we receive the following error:

''ProdumexError 30004: An unhandled exception occured while the device controller tried to display a screen. See the InnerException for details. --->
FileNotFoundException: Could not load file or assembly 'System.IdentifyModel.Selectors, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The system cannot find the file specified. 
<---''

{{ :support:supportguidev2:pdmxrelated:fatclients:error30004.png |}}

This is due to a .Net Framework bug

**Solution:** \\
Install the hotfix for the .Net Framework: 
[[https://support.microsoft.com/en-us/kb/2803760]]

This should solve the issue, and you should be able to start the fatclient without getting any errors.

===== 4.3.1.2. Error: Device Controller tried to display a screen =====
**Issue** \\
{{:support:supportguidev2:pdmxrelated:fatclientscreenerror.png|}}

**Solution** \\
Please adapt the .bat file of the scanner. Change “Touchscreen” to “PocketSize”. 

If the error still occurs change the resolution to W:240 and h:320 in the same file.

{{:support:supportguidev2:pdmxrelated:fatclientscreenerror2.png|}}