Send file to serial port using comfromfile

Hi,
I am current working on a project with requires to transfer a bin file to the controller, if the file is valid i will get the correct respose.
if we send a file in hyperterminal using send text file option i am getting response from the controlller as file valid.
I want to send a file through the code i used comfromfile function i am getting invalid file reponse from the controller even i tried byte by byte with comwrtbyte also i received the same invalid response..
I cross checked the rs232 configuraiton of both hyperterimal and my code..both are same..even i checked with port sniffer tool to capture the port data..both are same.
I am not able to find what is the issues with my code. what is the differece in the Hypertemail and CVI functions..
Regards
Vikram Kumar P

Thank you for your support....
As per policy i cant share my complete code..
whatever eariler shared code is a part of my application code where the binary data is transfered..there is no issues with formating reading coping.
I checked the serial data variable before sending the data is correct what expected to send.
I tried all the serial functions comwrtbyte, comfromfile, comwrt & visa functions..the same behavior is received
please find the attachment of catured data from portman tool.
attached 3 files
hyperterminal captured data - I am getting valid response from controller
cvi exe captured data - I am getting failed response from controller.
binary data - downloadable binary file to a flash memory using the RS 232 communication system
Attachments:
With CVI applicatoin exe.LOG ‏44 KB
With hyperterminal.LOG ‏44 KB
Binary data to transfer.txt ‏1 KB

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"Paro, Paula [CMPS:2721:EXCH]" wrote:
>
> Hi,
>
> I have a VI that send commands and receive answers from an instrument using
> de serial port.
> This VI runs perfectly when used alone.
> However I'm trying run two instances of that VI simultaneously using
> reentrant code and I'm facing some problems.
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>
> What is this?
> Does someone know how to prevent this?
>
> Thanks in advance for any help.
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