Card play manual undo didn't work

[riverwanderer]

Module V5.0.0beta2
Vassal V3.7.9

I played an Assault centre and began to order units. Then, I wanted to put it back into my hand and play a different card.

I lifted it into my hand and then played Scout Right.

This totally confused the engine offering no end turn scout

[riverwanderer]

Initial assessment:

You should have been able to drag Assault Center back and play Scout Right, provided no combat dice have been rolled in the turn. I've re-tested that and it seems to be working - the replacement scout play is recognised and end turn works.

It even works - at least in my tests - when combat dice have been rolled, though you have to drag the Scout card on to the board to play it, as the Play command is intentionally disabled.

I was able to confuse the module by playing Scout before I'd retrieved the Assault card, again I had to drag the Scout card out of hand, but you retrieved the card first, which as I say, I can't reproduce so far.
It sounds like you've been able to trigger a bug. If you try this again sometime, a log file will help me investigate further.

Workaround is possible, if tedious:
Even when End Turn fails, there is a way to recover, by doing a manual end turn:

1. Undo the failed end turn, if already made
2. Drag two cards from the draw deck to the main board. Take 1 to hand, discard the other.
3. From End Turn Options, choose "End Turn Only".

In general, the problem manifests by the new card not replacing the effect of the previous card. Manual combat dice adjustments and/or manual end turn operations may be needed.
Further more, any Counter-Attack will reflect the original played card, so also requiring manual adjustments.

[riverwanderer]

Closing as unable to reproduce or investigate further without a logfile.