If you call some ACSUtils function incorrectly, it will trigger an ACSUtils error.

ACSUtils errors instantly display an error message. All error messages begin with “ACSUtils error:”. The error message is displayed differently based on whether the error occured in singleplayer, clientside or serverside:

• In singleplayer, the error is printed using PrintBold.
• Clientside, the error is printed using PrintBold on the client. A “[clientside]” tag is prepended to the message.
• Serverside, the error is logged to server console using Log. A “[serverside]” tag is prepended to the message.

Error reports can be fully disabled by setting the acsutils_noerror cvar to true.

• Calling a function with incorrect arguments
• Calling a clientside-only function serverside (for example, IsOpenGL())
• Calling a serverside-only function clientside