Cannot execute the "ScriptCMDReset" command

Hi,

I'm calling ScriptCmdReset() at the beginning of my script and this seems to have worked successfully for some time. Then, today, for a reason I cannot determine, I get the following error message:

"You cannot execute the "ScriptCMDReset" command at the moment.
Other user commands are activated."

Needless to say, I can't think of a way to diagnose this further and determine what is causing the message. Can anyone help?

Thanks,

Simon.