This was one of the problems, but not the final problem.
I found out that the problem is, that postgresql have the build in feature "Overloading Functions", that means the same Function or Procedure Name can use with other parameter types. The Problem of my jRDC is, that i send an array of object to the jRDC2 like in the jRDC2 Tutorial, postgre is thinking i send varying types instead of the real types like integer,float,string, so postgre cause a error.
Now i search for a solution, where i can change the type like :"CALL procedure(? as integer)".