Help! I need your help

fluozhen · Post by **fluozhen** » Mon Jun 07, 2010 3:44 pm

hi all, can u tell me what does this information means:
UMD2FA: matrix is singular,only 432 pivots found.WARNING UmfpackGenLinSolver::solve(void) 4 returned in factorization UMD2FA().
thank u!

Post by **fmk** » Mon Jun 07, 2010 4:25 pm

you don't have enough constraints

fluozhen · Post by **fluozhen** » Tue Jun 08, 2010 4:48 am

[quote="fmk"]you don't have enough constraints[/quote]
Thank you for your reply, I constraint the basenodes, others are default. Is it right? Could you explain it in detail? Thank you for your patience and sorry for my English.

Post by **fmk** » Tue Jun 08, 2010 2:48 pm

if all your base nodes are constrained, it means you may be missing some elements .. start by constraining everything and then removing constraints until you find the source of your error.

fluozhen · Post by **fluozhen** » Wed Jun 09, 2010 11:01 am

[quote="fmk"]if all your base nodes are constrained, it means you may be missing some elements .. start by constraining everything and then removing constraints until you find the source of your error.[/quote]

Got it.Thank u.