The trouble is that InvokeJava raises exception NoClassDefFoundError if all required libraries lie outside of lib/ext folder. At the same time windows are recognisable and scripts can be run except for InvokeJava.
If all required libraries lie in lib/ext everything goes well.
It is not a good idea to collect all libraries needed to lib/ext each time. Does anybody know how to make Silk 7.1 not to raise exceptions

SilkTest_Java3.jar and methods jar are in lib/ext, all other libraries are outside

Thanks in advance