On Jun 18, 2020, at 1:00 PM, Mike Westfall via Tech-talk <tech-talk at aps.anl.gov> wrote:

I was trying to compile a simple IOC with an aSub record under EPICS R3.15.8, and I got this error on startup: dbLoadDatabase("dbd/asub-ioc.dbd") asub_ioc_registerRecordDeviceDriver(pdbbase) A call to 'assert(prt->no_fields == 308)'     by thread '_main_' failed in ../O.Common/aSubRecord.h line 663. Dumping a stack trace of thread '_main_': This error was not noted when compiling the same IOC under EPICS R3.14.12.8 I wonder what's going on...

The error means that when your asubRecord.o file was compiled the asubRecord.h file it was built from was created with a different asubRecord.dbd or dbCommon.dbd file than the one the IOC has just loaded. This may mean you didn’t do a ‘make distclean’ when changing Base versions in your RELEASE file, you’re linking with the wrong version of libdbRecStd, or the IOC is loading the wrong .dbd file.

I will look at changing the error message to make it clearer that this is an IOC build problem.

- Andrew