I am getting the above exception in Abaqus CAE/6.14-1 running on a HPC cluster while trying to edit the keyword block to insert keyword strings for equation constraints using mdb.models[modelName].keywordBlock.synchVersions(storeNodesAndElements=False). Same exception was thrown while setting storeNodesAndElements to True. The job was submitted on the cluster with 180 GB RAM and 400 GB disk space allocated. I have written the input file before editing the keyword block to check for any glaring errors but found none. The code works fine on Abaqus CAE 2018 and later running on a local machine. What is causing this exception and how to resolve it? I couldn't locate any details on this in the Abaqus manual.