CIRCLY Fatal Error Number 8204 – CIRCLY32.exe is missing or locked by antivirus

CIRCLY32.exe is the calculation engine used by CIRCLY.

It is highly likely that this error is a consequence of your antivirus software which has either:

  • deleted the file
  • moved the file to a quarantine folder, OR
  • locked the file


We have seen this issue arise as a consequence of a false positive introduced in a recent update of virus definitions in several antivirus programs.

A false positive occurs when an antivirus program erroneously identifies a legitimate file or process as malware.

Contact your IT Administrator for assistance.