We looked at your decision model, and the only suspicious thing we saw was your violation of our (unfortunate) implementation restriction:
the very first field inside the Datatype table should not have a basic Java type like int or boolean, but some real Java class like String.
So, we moved your last String attribute to the top:
| Datatype Wniosek |
| String |
wynikDecyzji |
| int |
liczbaDzieci |
| int |
liczbaCzlonkowRodziny |
| int |
dochodOsoba |
| boolean |
uwzgledniacPierwsze |
| boolean |
zaswiadczenie |
and now your decision model works fine.