Error messages

invalid input

The InputForm that is opened via NEW (asking for DATA, MODEL) will give the
error 'invalid input' if at least oneof the following items is true;

the field DATA is empty
the field MODEL is empty
the matrix in DATA has less than 2 columns
the matrix has 3 or more columns but the third column (i.e. the y-errors)
does contain one or more zeros
the function entered in the field MODEL does not contain a parameter,
i.e. a variable different from X
the function entered in the field MODEL does not depend on x

Couldn't find MDPRO -> NEW

   moda couldn't find MDPRO in the current directory, i.e. either you have just
   installed moda or you deleted/moved MDPRO. Use [NEW] to enter new data
   or copy another MDPRO to the current directory.

Wrong Argument

   [LEMA] takes a number from the stack which is the number of iterations to be
   done. This should be an integer or a real number greater or equal to 1. (If it's a
   real number then [LEMA] takes the integer part) [LEMA] gives the error
   'Wrong Argument' if the object on the stack does not satisfy these conditions.