MT4 Backtest M1 'compression' problem - Please assist

 
Hello

I have been using and testing EA's for a long time and yet recently I seem to be having problems with the new versions of MT4. Perhaps there is a setting I am missing or an overflow occurring in one of the files. Please help.

Example - Let us assume I have 6 months M1 data in MT4. Normally I would be able to backtest or optimize for the entire six months of M1 and yet no matter what dates I input (or leave 'use date' unticked), MT4 will simply cease using any more than 4 weeks or so.

I have had intermittent moments whereby all the data is used however, mostly the compression returns. I know the problem can't be a corrupt station because I have 3 downloaded and all behave the same.

I would appreciate Metatquotes assistance please.

Fxnorth
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