Thank you for your answer. Unfortunately I have still problems with writing a log to disk.
In Projects / options / Delphi Compiler Conditionals I put
DEGUG and FullDebugMode
The procedure FastMM_ApplyLegacyConditionalDefines is not callable in the application, but It is called in function FastMM_Initialize in FastMM5.pas. This function is called when starting the application (which I can test with the debugger). So a log file should be written, but unfortunately it is not ..?..
The variable FastMM_LogToFileEvents is set to a lot of events in FastMM5.pas. But I'm at a loss how to use it for persuade FastMM to write a log to disk at all ..?..
Best regards, Uwe.