Hello I am struggling to optimize a Sn based complex via a standard procedure described in the manual. The previously optimized geometry in another software just explodes. I saw that there is a way to use another initial guess due the tin presence. Is it worth using auxiliary basis set? I was using def2_svp or def2_tzvp basis set. Here is my .dal input: ``` **DALTON INPUT .Max IT 100 .OPTIMIZE *OPTIMIZE .Max IT 500 *MOLBAS .R12AUX **WAVE FUNCTIONS .DFT PBE0 *SCF INPUT .MAX DIIS 500 *ORBITAL INPUT .MOSTART H1DIAG **END OF INPUT ``` And my .mol input: ``` BASIS def2_svp def2_tzvp OPT PBE0/def2_svp calculation on Sn Auxiliary basis: def2_tzvp Atomtypes=5 Generators=1 2 Charge=8.0 Atoms=3 Set=1 X X X Charge=7.0 Atoms=1 Set=1 X Charge=6.0 Atoms=21 Set=1 X Charge=1.0 Atoms=19 Set=1 X Charge=50.0 Atoms=1 Set=2 X ``` The calculation starts but rapidly just freezes. What am I doing wrong? Thanks in advance