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when i build the program it gives ERROR: CAN'T OPEN FILE 'hm'... out put box will shown below error
Build target 'Target 1' compiling t.c... linking... Program Size: data=11.0 xdata=0 code=67 creating hex file from "hm"... OBJECT TO HEX FILE CONVERTER OH51 V2.6 COPYRIGHT KEIL ELEKTRONIK GmbH 1991 - 2001 *** ERROR: CAN'T OPEN FILE 'hm' "hm" - 0 Error(s), 0 Warning(s).
So the big question is then: what did you do to try to figure out _why_ the compiler couldn't open this magic file "hm"?
And the follow up question: What was the conclusions from your investigation?
when i build a program with out making hex file it works perfectly but when i build the program with hex file then it gives this "error: can't open file....."
So your answer to Per's question is: no, you haven't done any analysis of your own, and thus have no results of such analysis to report.
So here's the first question you should have asked yourself, before even coming here: is there a file called "hm" in your project directory tree?