Can not find PGM MATRIX

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Hi,

I just started learning Cube scripting. I've got this error when I run a script.

Can not find PGM MATRIX (location=12200)

What does that mean?

I've tested a small program and it works. Then I copied a "RUN PGM=MATRIX" block and pasted it at the end of the script and made some changes in it. Then when I ran it again, I got this error in the .PRN file. The error message in the popup window says: Access Violation at address 01066A80 in modle "TPPDLIBX.DLL"

Is there a place where I can find clues to my problem?

Thanks,
Yuan