bat file - how to ignore window errors

[AlexB]

I'm launching pdf files within a bat file.  I pass the instruction into bat file as a parm.  It works great except for when the pdf doesn't exist and displays error window.  Is there any way to ignore the error and don't display the error window?  Is there a way to check if the pdf exist first before launching the pdf? 

The bat file has the following code:

@Echo off
start %1
EXIT

The following is the nstruction sent as a parm:

\\USDCAWS37750237\softwares\Temp\PDFs\CBL_2005.pdf

Thanks,
Alex(newbie)

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[2k_dummy]

Try using the IF command. Type IF /? at the command prompt.

[AlexB]

Your suggestion worked indirectly.  I entered "IF /?" and it returned an syntax error displaying possible corrections which mentioned "Exist".  The combination of "IF EXIST filename START filename" worked.
Thanks for the tip!
Alex