When I try in the isql the select

Select ABS(total) from MVENTAS

Being total a Double precision , i got the error

Statement failed , SQLCODE = -104
Details
invalid request BLR offset 59
-function ABS is not defined
-module name or entrypoint could not be found

Odd thing , because if i do a show functions , abs is defined and well

Is there any known issue with this function for Interbase 5.6 running on
Linux ?

Any pointer is much appreciated.


Javi
EntreBytes S.L.
Ontenient , Spain
ERP Development.