Variables from previously selected dataset are displayed

[HelenClifton]

Expected behavior

Describe what you expected Cate to do. Selected tseries_point operation on Cloud dataset and selected variable cfc. Added the step. Selected tseries_point operation on soil moisture dataset. In "New Operation Step" dialog, expected variable selection box to be empty

Actual behavior

Variable selection contains the cfc variable from the Cloud dataset (which does not exist in soil moisture dataset)

Steps to reproduce the problem

Attached here: steps to reproduce.docx

Specifications

cate-2.0.0.dev.7 Windows 7 Professional

[forman]

Yes. If variables can not be found in the selected dataset, fields of type VarNamesLike or VarName should be cleared out.

[bwuerzler]

Hello. I also experienced this error, but in a slightly different way. After the visualization of some cfc data i removed it from workspace, opened and tried to visualize some aerosol data. However, the created plots showed the cfc data displayed before, no matter how often i retried to visualize the aerosol data. For me it seems like the cfc data was not completely removed from the session and in the end i had to restart cate.

Edit: I see my error is already reported in issues #647 and #800