Hi,
before trying to manage your own logging mechanism, have you tried DOC logging tools ? See https://www.ibm.com/support/knowledgecenter/en/SSQVNT_3.9.0/ilog.odms.ide.odm.enterprise.help/ODME/Userman/topics/Advanced/AdvTop3Logging.html
PS: if you rely on solveanyway what you do should work fine
regards
similar question at https://developer.ibm.com/answers/questions/433424/in-doc-opl-how-to-persist-data-to-an-output-table.html
Source: Re: How to persist data to an output table when the model is infeasible