Thanks for reply,, this error it happened only in one program calls an other 2 programs,

the called program reads a record form Indexed file then it called a sub-program which makes some calculations in that record and gets the results back to the called program.

I'm in editing phase I tried to animate it, but no progress, because it happens after  reading hundreds of records, I made a manual break point to the certain record no when it stops, but I did  not reach that number because it does't stop on the record number,,

I've read a lot in the Web concerning this error, mostly they say the mfc42.dll is corrupted and needs to be reinstalled. 

therefore I made a trial installation for Netexpress 5.1 in other machine with a fresh Windows 7 installation, then everything works fine.  

in my situation I can't do that because I'm restricted with installed response key for Netexpress.

so I thought of an other solution: I copied all the logic for the called program and I put it in the calling program and instead of calling that sub-program I used Perform statement ,, then it works fine.

as you know this solution is not always right, 

Thanks for reply,, this error it happened only in one program calls an other 2 programs,

the called program reads a record form Indexed file then it called a sub-program which makes some calculations in that record and gets the results back to the called program.

I'm in editing phase I tried to animate it, but no progress, because it happens after  reading hundreds of records, I made a manual break point to the certain record no when it stops, but I did  not reach that number because it does't stop on the record number,,

I've read a lot in the Web concerning this error, mostly they say the mfc42.dll is corrupted and needs to be reinstalled. 

therefore I made a trial installation for Netexpress 5.1 in other machine with a fresh Windows 7 installation, then everything works fine.  

in my situation I can't do that because I'm restricted with installed response key for Netexpress.

so I thought of an other solution: I copied all the logic for the called program and I put it in the calling program and instead of calling that sub-program I used Perform statement ,, then it works fine.

as you know this solution is not always right, 

Thanks for reply,, this error it happened only in one program calls an other 2 programs,

the called program reads a record form Indexed file then it called a sub-program which makes some calculations in that record and gets the results back to the called program.

I'm in editing phase I tried to animate it, but no progress, because it happens after  reading hundreds of records, I made a manual break point to the certain record no when it stops, but I did  not reach that number because it does't stop on the record number,,

I've read a lot in the Web concerning this error, mostly they say the mfc42.dll is corrupted and needs to be reinstalled. 

therefore I made a trial installation for Netexpress 5.1 in other machine with a fresh Windows 7 installation, then everything works fine.  

in my situation I can't do that because I'm restricted with installed response key for Netexpress.

so I thought of an other solution: I copied all the logic for the called program and I put it in the calling program and instead of calling that sub-program I used Perform statement ,, then it works fine.

as you know this solution is not always right,