Tried converting my project and found some issues. Note that ‘Preview 5’ is first 4.7 build I’ve tested.
Issue 1: Play In Standalone is broken due to blueprint compilation issues that manifest in standalone but not in Editor or PIE mode. It also crashes with an error Access violation - code c0000005 (first/second not available) @ unrealtype.h:996 and standalone logs complain that ‘Target’ attribute of certain blueprint nodes are not disconnected even though they are in fact connected.
Log excerpts:
Error current value of ’ TargetArray ’ pin is invalid: Array inputs (like ‘TargetArray’) must have an input wired into them (try connecting a MakeArray node).
Error Variable node MyVariable uses an invalid target. It may depend on a node that is not connected to execution chain, and got purged.
Error blueprint (self) is not a SomeGameBlueprint_C, therefore ’ Target ’ must have a connection.
Workaround: None.
**Issue 2: **Frequent editor crashes with an error Invalid in GC: 0x0000000000000030, ReferencingObject: MyBehaviorTreeTaskBlueprint_C. offending BT Task blueprint compiles just fine. crashes occur i) after a PIE (Play in Editor) session ii) on hitting save iii) on play in standalone
Workaround: None. Unless I delete node instances of offending task from behavior tree, persists.
Issue 3: Loading my game’s map crashes while loading “cached shader maps”/materials/etc. There is no error message at and logs end abruptly. starter maps load fine.
Workaround: In my 4.6 map I changed my map to be fully dynamic and ticked force no precomputed lighting and then migrated map to 4.7 Preview 5. map loads fine now although I haven’t tried turning lightmass back on and building lights.
PS: I do intend to post these in but like most issues these are only reproducible in my project, standard maps and Epic samples work fine. I wanted to post a dump of these issues here first as I’m swamped with project work right now and it takes a while to diligently gather information needed for raising proper bug reports for these.