-663 You are using more than one procedure-calling syntax for

While calling a procedure, some of the arguments were named, but others were not.

Example of error:

LET var = proc (arg1 = 10, 20, arg3 = 30); -- error

Correction:

LET var = proc (arg1 = 10, arg2 = 20, arg3 = 30); --correct LET var = proc (10,20,30);--correct