8.5.2 _MemcheckSymbols not found ACCESS_VIOLATION error

Running 88.5.2 on Windows 7with File Navigator

Comes up in Interactive Services:

Warning: NNOTES.DLL _MemcheckSymbols was not found

Error: NSD thread c4c got system exception: ACCESS_VIOLATION (3221225477)

Happens every few minutes, when not actually doing anything.

quite annoying may have to go back to 8.5.1