Hi,
did you use the old input file from the pervious run when restarting dscf with the new basis set?
The error could result from an inconsistent input file - the dimension of the CAO-SAO transformation matrix seems to be wrong, i.e. it does not match to the numbers of basis functions you have. Did you lower symmetry or used the old mos when changing the basis set?
Could you try just to use the coord file and generate a new input file from scratch with define?
And finally: did you run Turbomole 5.9 ? If not, try the aoforce binary of the latest official version.
Regards,
Uwe