Build errors installing knowrob

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Hi, Thanks for the reply. I follow the instructions give here http://cram-project.org/installation under section Ubuntu 14.04. My workspace are setup as directed in those instructions. The knowrob is also installed according to the instructions given above.

I followed your advice and removed the .gradle ,build and devel folder but still get that error. So the error message that I see is

Scanning dependencies of target gradle-json_prolog Scanning dependencies of target gradle-knowrob_srdl [ 85%] [ 85%] Gradling tasks for knowrob_srdl Gradling tasks for json_prolog

FAILURE: Build failed with an exception.

• Where: Build file '/home/rohan/Peretec_work/workspace/ros_kb/src/stacks/knowrob/json_prolog/build.gradle' line: 41

• What went wrong: A problem occurred evaluating root project 'json_prolog'.

  Could not list contents of '/home/rohan/Peretec_work/workspace/src/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple/test/scenarios/hello_world/catkin_simple'.

Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. make[2]: * [stacks/knowrob/json_prolog/CMakeFiles/gradle-json_prolog] Error 1 make[1]: [stacks/knowrob/json_prolog/CMakeFiles/gradle-json_prolog.dir/all] Error 2 make[1]: ** Waiting for unfinished jobs...

Is this related to catkin_simple?

Please let me know what more information you need?