<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>Dear Molpro users,<br></div><div><br data-mce-bogus="1"></div><div><br></div><div data-marker="__SIG_PRE__"><div>I want to perform a CASSCF calculation for CH2IO2 in C1 symmetry.</div><div>But I have got this error:<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div> ITER. MIC NCI NEG ENERGY(VAR) ENERGY(PROJ) ENERGY CHANGE GRAD(0) GRAD(ORB) GRAD(CI) STEP TIME<br><br> **** SINGULARITY IN SCHMIDT ORTHOGONALISER<br> ISTATE = 1<br></div><div><br data-mce-bogus="1"></div><div>I would appreciate if you could help me to resolve this problem.<br></div><div><br data-mce-bogus="1"></div><div>Best regards.<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Dorra.<br data-mce-bogus="1"></div></div></div></body></html>