FNP 11.11.1.1 problems with preptool and FNPLoad library version mismatch

I have submitted this as an incident ( #SIOC-000148536 ) but while I wait for a response, perhaps someone else in the user community or support wing has an answer. In brief, while I am building InstallASR in my custom build environment (which has not changed recently and still successfully builds FNP 11.10.0, 11.10.1, and 11.11.0) I get this error message in the preptool stage:

I confirmed that the preptool binary is the one form the 11.11.1.1 release. Note that this is Linux. The problem occurs for both i86_lsb (32-bit) and x64_lsb (64-bit).

Any suggestions will be appreciated.

- DH