Hi @Paul,
io_Siemens_XA2VE.m requires two scripts from Osprey. Have you the current version of Osprey?
In your script line 77 is “rda.PositionVector(1) = str2num(value)” and in the current version this is at line 101 (osprey/libraries/FID-A/inputOutput/io_loadspec_rda.m at develop · schorschinho/osprey · GitHub).
There is also an older discussion about this script (CoRegistration Error in Osprey with NIfTI), but I don’t know whether it’s suitable for the use at CSI data.
Best,
Heiner