@richboy2307 please find attached the flightplan.
I was preparing arrival for RWY 27 at VAAB, I insterted the rwy 27, ILS Y, STAR POKON2A, in both TRANS and VIA EXOLU, I went to TMPY F-PLN, then I switched to plan mode in EFIS to review the route, and I noticed that EXOLU in both VIA and TRANS was conflicting, so I clicked UNDO in the MCDU and got all the screens frozen and when I checked the log and there was that WASM error.
OMDBVABB_PDF_1742123561.pdf