I have some valid jar file for installing it on Nokia 6230. Jar file contains text config file. I open jar file, change parameter in config file and update jar - and jar becomes invalid from the point of view of Nokia 6230. But I need it to be valid..
How to do it?
Try packing it the "Java way" using the jar utility. Or at least unpack and repack the jar completely with Winzip, instead of updating the jar from within the application. This is just a hunch but it might be doing something screwy.