Problems with datetime...

I have a weird problem with a datetime host-variable (ESQL/C - 5.08 for SOLARIS). I use it as: void foo(){ $datetime year to fraction(5) stWhen; $char szWhen[26]; dtcurrent( &tWhen); dttoasc( &tWhen, szWhen); $insert into t1( :tWhen); return_to_user_and_log( szwhen); } Most of the time, calling foo() works just fine, but sometimes I get the error: '-1263 A field in a datetime or interval is out of range.' and my log produces: [1997-06-04 15:02:31.8200+] instead of: [1997-06-04 15:02:31.82000] as I expect it to. Where does the '+' sign come from ?? Anybody seen anything like this, please let me know. /erik