Question: error with rand function

Hi, I am very new to Maple and i was using Maple with a code that was running well when suddenly the rand() function that i use started to fail. and i get the error:

> rand();

Error, empty number


also i get many aditional errors in some sentences where i am addressed to some '?' simbols which are supposed to be in my sentendes.


has anyone gone trhough that? any help will be appreciated.


Please Wait...