at



L.S., 


What goes wrong here :

(%i2) atvalue(x^2,x=4);

Maxima encountered a Lisp error: Error in MACSYMA-TOP-LEVEL [or a callee]: MACSYMA-TOP-LEVEL [or a callee] requires more than two arguments.Automatically continuing.To reenable the Lisp debugger set *debugger-hook* to nil.

and here

(%i4) atvalue(x^2+y^3,[x=1,y=2]);

Maxima encountered a Lisp error:
 Error in MACSYMA-TOP-LEVEL [or a callee]: MACSYMA-TOP-LEVEL [or a callee] requires more than two arguments.
Automatically continuing.
To reenable the Lisp debugger set *debugger-hook* to nil.


or what did I wrong ?

I don't understand the error_comment 


Thanking you in advance for you help.

Best regards,

Jos? Simons