Running win32 fpc 2.7.1 10/01/2014

Compiling with no -v options.I get

An unhandled exception occurred at $0043C670:37
EInvalidOp: Invalid floating point operation
$0043C670 REGRESS, line 347 of c:/com/livel.pp

When I check what this line no is it is last line of a procedure regress which does linear regression calcs.

I've normally got more line no info for fpu problems eg the line in regress at which it went wrong, which would be helpful.

Have the defaults re line nos changed in latest 2.7.1s?. Do I have to compile with -vl to get more info?

Any ideas on how to fix welcome.
John