Hello, is there any reason why doing an EXP of a negative base in a CALCA block (haven't tried MATH or CALC) yields a PROG_ERR 9? Did I miss the lesson in school that taught negative bases are invalid? Regards, -- Sascha Wildner erpicon Software Development GmbH Neusser Str. 724-726 50737 Köln Germany Phone: +49 221 9746089 Fax: +49 221 9746099 eMail: swildner@xxxxxxxxxx _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave