Strategy Tester - Absolute Random behavior deleting file during read...convince me otherwise!!! (BUG!)

 

Apologies for the provocative title but I need someone to please explain how to keep the strategy tester from deleting files in the

test area even though #property tester_file <file> is set and the file is in the correct location.  Sometimes the tester works and sometimes

it gets in a state (which can't be reproduced) whereby it starts deleting the file so that it can't be opened by the EA.  I have no idea how

to make the strategy tester work reliably under these circumstances.  Any help greatly appreciated.