For Win7, ActionScript
I built an InDesign extension in ActionScript using the Creative Suite Extension Builder.
I wanted to copy the Creative Suite Extension Builder project to another folder and import it to another workspace. The "Import Flex Project" from the new folder succeeded, but any attempt to build it produces the dreaded error message
""Could not find project's extension manifest file. Make sure the manifest exists at .staged-extension/CSXS/manifest.xml. <MyProjectName> line 1 Problem"
Needless to say, ".staged-extension/CSXS/manifest.xml." exists.
Try "Clean Project"?
I just ran into this problem again - and fixed it by exporting the project from its original worksapce using Export Project, instead of just cpoying the project folder manually.