It was happeneing to me yesterday when trying to decode a couple of 23cm beacons that run JT4g.
I'm running Windows 10 Pro on an Intel i5, 3.2GHz with 4GB RAM, if that helps?
Today, when I swapped from FT8 to Q65 it happened again. Error message as follows;
Running: C:\WSJT\RC1\wsjtx\bin\jt9 -s WSJT-X -w 1 -m 3 -e C:\WSJT\RC1\wsjtx\bin -a C:\Users\Owner\AppData\Local\WSJT-X -t C:\Users\Owner\AppData\Local\Temp\WSJT-X
At line 24 of file C:\Users\bill\src\k1jt\wsjtx\lib\spec64.f90
Fortran runtime error: Array bound mismatch for dimension 1 of array 'cs' (1800/0)
Error termination. Backtrace:
Could not print backtrace: libbacktrace could not find executable to open