There are a few things you can check / try to resolve this:
1- Try checking out this map in MAPC then releasing it with ADSM.
2- If the error is caused by IDD security being on; then in IDD:
a- issue SET OPTIONS FOR DICTIONARY SECURITY FOR IDD OFF;
b- the same for SECURITY FOR IDMS-DC - turning these off may allow you to generate the map in MAPC and then release it;
c- Alternatively, you could issue a MODIFY USER xxxxx AUTHORITY FOR UPDATE IS (entity type list including MAP). d- In IDD, you may need to modify the userid of the user trying to do the map modification so they are registered to do that.
3- You can try to get current on the map in MAPC and select DELETE then DELETE CHANGES then MODIFY and RELEASE. You may then be able to process the map.
4- You should be able to use an optional APAR to get around this, though we don't advise it on an ongoing basis. OPT00235 causes both batch utilities to ignore the checkout flags. You can try this if you need a quick fix.