Open Script Errors :An internal error occurred during: "Launching Open Script".
Some times we get an internal error in the open script during recording and playback of the script and open script workspace stopped responding.
Error and exceptions : java.lang.NullPointerException
Resolution of this problem:
a) Save the script and all the assets related to open script worksapce and close open script.
b) delete the osworkspace directory or rename it .
c) It is always advisible to rename it rather than deleting it , but in case renaming doesnt resolve the issue then it is recommendable to delete it (but backup before deleting it).