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I have a very strange problem. Please advise if you can. I have written a very trival C++ application to integrate by java program with windows OS to run as a service.
Namely I install service, service calls a bat file when started and bat files contain DOS scripting to to start my java program.
While there are better solutions, this solution work fine. I have given this info for background infomation.
Sometime my application must write to an ouptut stream using codepage 437. When it does so I get an "java.io.UnsupportedEncodingException", cannot find cp437 etc. However charset.jar exists in jre lib folder & is specifed on sun.boot.class.path. This only happens when I start run my application from my service.
When I run command from a command prompt, processin of cp437 happens no problem. This there some reason why when running as service, that charsets.jar is not being loaded on classpath?
Is there a separate CLASSLOADER being used somewhere?
I have recently down an upgrade to my application, no changes in upgrade affect encoding etc but before upgrade I had no issues with 437.
I hope problem isn't too vague, if anyone has any suggestion it would really help. I am considering reinstalling jre
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Then there's something different in your service setup vis-a-vis your command line. Relative paths relative to a different working directory? Mapped drives referenced in your command line? Using different JREs? You'll have to find out what.