I am using Gaussian's ONIOM software for this calculation. And receive the following error message :

Missing atomic parameters for atom 234 IAtTyp= 0

Missing atomic parameters.

I have tried to use the parmlookup function in addition to trying multiple keyword combinations but I cannot seem to get past this error. Atom 234 in this case is a carbonyl carbon that links the QM region to the MM region of my calculation

My job input is as follows:

#p oniom(B3LYP/6-311G(d,p):amber=hardfirst) nosymm scrf=(smd,solvent=water,oniompcm=x) geom=connectivity iop(2/15=3) test opt=quadmac

I've also tried the following keywords are replacements:

amber=softfirst

opt=quadmarco

This error occurs after 12 PCMM matrix inversion algorithm cycles and the MM parameters for the model system are supposedly made.

I have attached my .com and .log files for the job