CBECCcom crash error

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I am running a very large in CBECCcom and have come across this error [it appears 10 times]:

2015-Dec-16 16:05:56 - Error: Data Retrieval from BEMProc failed (invalid AirSys object (class 34, iOccur 256, eObjType User, iError -2)) in GetBEMProcData() evaluating rule: Set SIZING_PROPOSED ThrmlZn:ExhOperMode (75:'HVACSecondary-ExhaustControls.rule' line 305)

I have contacted the CEC about this, but a major road block is that I am currently not able to submit the model due to an NDA on the project. They have responded, but I still have not been able to rid the error; which is a huge error as it only shows up after the model has run & crashed. so, has any one see this error? Or know a decent way to track it down? I havent found anything in searching thru the google code references either....I have been able to take the E+ proposed file that is generated and run it successfully [and along the way found some other errors to correct] - but not this one. Oddly, I have found 10 errors in the .err file relating to the air flow / cooling capacity / leaving air conditions of 10 zone systems....which makes me wonder if these are the 10 errors, but they are some how being put in the CBECCcom log file as AirSys exhaust errors....worth a shot at this point. If it is not these errors and I can get an E+ file to run fine, it further indicates that it is possibly on the CBECcom/RulesSet Check....any ideas are welcome.