NOTE: While setting the command line argument, the length of the command line used to launch the published application (InitialProgram) cannot exceed 256 characters including the path to icast.exe and the ending null character.
The 256 character limitation is defined by a Microsoft constant on the terminal server.
Complete the following to resolve this issue:
1. If using Windows clients, use the LongCommandLine setting. Refer to ICA Settings Reference: https://docs.citrix.com/en-us/receiver/windows/ica-settings.html
2. Application can be launched using a script as a workaround.
Refer to CTX966450 – How to Publish an Application Using a Shortcut (.lnk file) for more information.