While conversion of S/4HANA the tool stop in phase IS_SELECT asking you to make a decision regarding DMIS_CNT addon. But even after choosing "Keep version" and including the ACP file, the tool will not continue.
You can regenerate the issue by selecting "Keep Version" option for DMIS_CNT addon in IS_SELECT phase of SUM.
The error is caused because the product instance "TDMS for ABA S4HANA" has not been included to the target section of stack.xml file which was generated by using Maintenance planner.
Therefore make sure that the selection of SAP TDMS is made during the stack.xml file generation in Maintenance planner and also make sure that the ACP "DMIS_CNT==2011_1_731" is present in EPS/in directory: