Program code with solve function

[SoxxoZ]

Hi, sorry but I need help
I'm able to create little program for my utility, but I can't use solve. I have tried all type (solve, fsolve, CAS.solve, zeros) and many modifications of format.
Can you share with me a little portion of code with a solve function?

For exampio this doesn't work:

Code:



EXPORT SOL()
BEGIN
  LOCAL S;

 S := CAS.solve('x^2+3*x-4=0', x, 1);


  PRINT("Solution for x: ");
  PRINT(S);

END;

Thank you guys