Crystal Reports "Access to report file denied. Another program may be using it."

I encounter this problem several times, the way to get around this is to give "Everyone or Network Service " permission to "C:\windows\temp" folder. I gave everyone on my development box just for convenient.

I hope it will help you solve the same problem as I had. 

Here are some references:

http://forums.asp.net/t/985047.aspx

"It is enough to give read, write permission to NETWORK SERVICE user. crystal report create a temp file with guid for name in windows temp folder, so it needs write permission to the disk to make create that temp file." 

Crystal Reports "Access to report file denied. Another program may be using it."

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