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My educated guess:
Windows CMD.EXE has a limit on the total # of bytes for environment variables and the names of the variables: 32,767. Your URL has 16K bytes, and it's put in the environment more than once (request_uri, path, query_string). So the process can't be created with that big an environment. Solution: use HTTP POST method instead of GET. Although the IETF standards don't specify a maximum length for URLs, RFC2616 does say "Note: Servers ought to be cautious about depending on URI lengths above 255 bytes, because some older client or proxy implementations might not properly support these lengths." FYI: Microsoft IE and IIS limit URLs to about 2K. In reply to Re: Problem with qx/system and long urls
by Thelonius
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