Hi Susy,
Sorry for the delay in responding. Are you still getting an error? If so, here are some things you can do that may resolve the problem:
1) Close and re-open LEAP.
2) If you haven't already done so, please update to the latest version of LEAP (version 2017.0.8.0). Newer versions of LEAP contain bug fixes which may resolve the error. You can update LEAP by clicking on "Help: Check for Updates".
If the error persists, please provide us with a detailed description of what you were doing prior to receiving the error (i.e. if you made any big changes to the data set, if the error occurred while calculating results, etc.). Please also send us your system info which can be copied from "Help: About LEAP".
Thanks!
Emily