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I've been trying to run mkgmap.jar to convert Open Street Map files to .img files to use on my Garmin ETrex 30. The program runs under Java from a Windows command prompt and always fails with an out of memory/Java heap error.
Most Java articles I've found on the internet suggest using the -Xms switch to set the minimum size of the java heap but the version of Java on my Windows 8 machine (Java 7 update 45 64 bit) reports an unrecognised switch when I try to use this; the help switch shows no heap size related switches either.
Does anyone know how to increase the java heap size for an applet running from a command line?
You sure you're running an applet?
Anyway, try: java -Xms40m -Xmx1024m -jar mkgmap.jar
Edit: note the lack of spaces, that's probably where you're going wrong.
It's a .jar file (not sure if that makes it an applet or not) but your suggestion seems to work, thank you!
Happy to help!
FYI: (fascinating fact follows...)
An applet runs in the browser, a cmd line jar is an application.
For future use I'd make a .bat file.