PLS-00306 Error

Hi all,

I get the error
Line # = 19 Column # = 24 Error Text = PLS-00306: wrong number or types of arguments in call to '||'
Line # = 20 Column # = 9 Error Text = PLS-00306: wrong number or types of arguments in call to 'INSTR'

where my line 19 & 20 are is
dbms_output.put_line('router = ' || router);
a := instr(router,'-');

I have used these commands hundreds of times before, but have never seen this. Does anyone know what might be causing this error ??

Shiva.

What datatype is "router"?

Thanks for pointing out the error. 'Router' was of numeric dataype.
Now it works fine.