Solution : https://service.sap.com/sap/support/notes/439761 (SAP Service marketplace login required)
Key words :
D020L, screen load, deadlock, 00C90088RUNT_ILLEGAL_SWITCH, DYNPRO_WRITE_FAILED, DYNPRO_READ_FAILED
Related Notes :
| 596748 | Simultaneous generation of selection screens in background |
| 400216 | Forcing minimum patch level of the database library |