Problem:

While Trying to Save Image from IP Master user gets the error below.

If you check IIS logs the HTTP status will be 413.

Solution:

For this error uploadReadAHead size for virtual directory Bwroot should be increased:

This can be done from the web server as

1. Run command prompt as administrator
2. Type following command and press enter:
   appcmd.exe set config "Default Web Site/Bwroot" -section:system.webServer/serverRuntime /uploadReadAheadSize:"204800"  /commit:apphost
3. Please note that above value 204800 is in bytes and can be changed according to the need. Maximum limit of this is 2147483647 bytes.

Another way to do this is by Using Configuration Editor:

1. open windows run and type inetmgr 
2. select Bwroot 
3. In the Features section, double click "Configuration Editor"
4. Under "Section" select: system.webServer>serverRuntime
5. Modify the "uploadReadAheadSize" section
6. Click Apply

After this IIS should be restarted.