In Java explorer Value Type for Random Uniform Integer (RndUniN) is java.lang.String hence it can be used for concatenation to another String but when the same is exported to Silk Performer following error is displayed.

subTest_strclassid_concat_12(java.lang.String) in TestClass cannot be applied to (int)
myString_1 = subTest_strclassid_concat_12(;
1. How to correct it?
2. Is this a bug? I think this should be handled before exporting.