Just installed my software and tried playing with entering data.

I try to save after entering a few pipes and get this message:

"forrtl: severe (47): write to READONLY file, unit 0, file
Image PC Routine Line Source
libifcoremd.dll 03A633B6 Unknown Unknown Unknown

Stack trace terminated abnormally."
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Ver. 7.00.00.2800

Caesar II novice

Mostly used for refrigeration and thermal fluid pipe analysis.