[flexcomponents]Compc cannot find source code in source path???

[dorkie dork from dorktown]

Flex ant tasks is giving me this error:

Error: could not find source for class com.flexcapacitor.controls.HTML.

My project has a [source path] to another project where I keep my
com.flexcapacitor.controls.HTML mxml component source code. The component
source code project is open and all the mxml applications in the first
project run when testing and building with FB.
I'm guessing maybe compc cannot follow linked resources (defined path
variables)??? Windows > Preferences > General > Workspace > Linked Resources

Defined Path Variables.

this is driving me nuts.