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Compiler/MSP430FR5994: [E0300] The following symbols are undefined: but lists nothing

Part Number: MSP430FR5994

Tool/software: TI C/C++ Compiler

I am attempting to port GNU assembler code into the CCS TI v18.12.1.LTS compiler.  Some of my source files are showing the following error:

[E0300] The following symbols are undefined:

But no symbols are listed.

Does anyone have any experience with a similar error?  Any clues would be appreciated!