AD Main Injector Department » Main Injector RF Control Application (PA1677, I3)

So the save feature works as such:

1. hv.cpp > hv_save()
2. hv.cpp > hv_convert()
3. hv.cpp > table.cpp > table_save()
4. table.cpp > table_rec_w()

Everything appears fine until table_rec_w(). The float array leaving table_save() has no NaNs. As soon as the float array of values is passed to the table_rec_w() routine using the GEN_TABLE struct the float array is padded with some very small values and NaN at indices 231 and 233. I can get the save to complete successfully by overriding the values at indices 231 and 233 with zero.

This may have been a problem for sometime. The I3 program log shows this error occurring back on December 30, 2014. Unfortunately the log has a 1000 line limit which puts the logger at December 17, 2014. There are no successful file saves recorded other than the one I fudged tonight.

In hv_save() the HV_TABLE object contains a TABLE_HDR object, a float²⁰ for pars and an HV_SLOT⁵² for slots. The HV_TABLE object is cast to a GEN_TABLE object that contains a TABLE_HDR object and a float²³⁶. Each HV_SLOT is 4 floats. That makes a HV_TABLE object actually a TABLE_HDR object and a float²²⁸, this is shy 8 floats for the GEN_TABLE object (two HV_SLOTS). The GEN_TABLE object never populates its last 8 float indices leaving in a couple NaNs.