More warnings while parsing

[Bart Bogaerts]

Now, when accidently writing the following

x = {A1; A2; B1; A2;},

no warning is thrown. I would throw a warning here: "double .

Also, if later, in a function we write

f= {A1-> A1; A2 -> A2; B1 -> A2; A2 -> B1;}

(again, intending to write B2 instead of A2, no warning is thrown, mx, just returns "no solutions". (in debug mode this throws an assertionexception in StructureCOmponents.cpp:2492

[Broes De Cat]

Removing milestone: Later (automated comment)