Hi Neks, I'm trying to restar an ascii *.fld02 file, but I get the following error message: set initial conditions Checking restart options: start.fl02 nekuic (1) for ifld 1 Reading checkpoint data 0 0 OPEN: start.fl02 byte swap: T 1.35684711E-19 6.40740794E-10 17872 5 5 5 1.530191500E-03 2 X Y Z U NELT,NX,NY,N 0.000 0.000 0.000 0.0 NONSTD HDR, parse_hdr, abort. ERROR: Error reading restart header in mfi_prepare ierr= 1 I set param(67)=0. in the .rea file and also in userchk subroutine. What is wrong? I saved the file using param(66)=0. and I didn't change anything... Thank you in advance SL