If you're running with jna.protected=true, you'll need to preload libjsig.so, e.g.

LD_PRELOAD=/path/to/libjsig.so java {java program args}

You have a single entry point, SWIrecInit(), which presumably expects a wchar_t* argument. On linux, wchar_t is 4 bytes by default, although you should check your library's documentation since it's possible to force a difference size. If it's expecting a char* argument and the windows version expecting wchar_t*, then you'll need to optionally use a type mapper on the windows version.

Apparently your third-party library could do more thorough error checking, since it looks like it's dereferencing a NULL pointer.

Given the simple entry point, the problem is more likely environmental than anything to do with the JNA mapping itself (assuming the mapping is correct -- you didn't provide a C prototype). LD_LIBRARY_PATH will likely be different between a C program and a java program (java adjusts the value and may fork a new process to ensure the path includes its own paths).

On Jun 4, 2009, at 8:00 PM, Mark Click wrote: