Basically i opened jess.bat then passed (batch a.clp) it works because it must.
But how to make file .bat? which will open jess.bat and then execute line:
PS i'v tried everything and i found other way by putting a.clp in file jess.bat: %RUN_JAVA% -classpath ".;%JESS_HOME%\lib\jess.jar;%JESS_HOME%\lib\jsr94.jar;%CLASSPATH%" jess.Main %1 %2 %3 %4 %5 %6 %7 %8 %9 "path"/a.clp