Getting "required FBType E_DELAY not available" and similar for other FBs, usually when leave IDE in console.
Restarting the IDE does not help. It appears the WS is becoming corrupted, but messages to not give enough info to know what to look for in the XML.
For LMS FBs those not available were those used in Composite FBs and in a different directory. Opening the FBs in the IDE got rid of the messages. Closing the FBs the messages came back
I have seen/recreated the problems several ways.
1. My usual WS with a number of systems.. edited System devices and resources... Going back to a clean WS copy, I cannot seems to edit System without this happening.
2. Empty WS letting it creating the WS:
A. Went away when restarted
B. Created a new system - restarted several times.. still get this message, but E_DELAY (only FB not available I checked).
But after I opened the E_DELAY in the IDE the message went away. Similarly for LMS FBs said not available.
Some messages from console:
17628
17629
17813
required FBType IN_CHOICE not available
required FBType N_TBL not available
17814
17815
17816
17817
required FBType E_CTU not available
required FBType OUT_ANY not available
required FBType FB_LABEL not available
17818
fixed in cset dbf4c61caae6
The changes done in this bugfix should hopefully also improve the situation on system import