Error: The type java.io.ObjectInputStream cannot be resolved

Hello,
I have a problem with the upload model to server function.
I downloaded the newest SpagoBI-Meta-5.2 and I am trying to upload datamart and model on server.
I have created a new .sbimodel, imported 2 tables to the physical and business model.
When I am trying to "Upload datamart and model on server" (via right mouse click) it comes with error:

Error generating datamart.jar for model XYZ.

There is an error in metacompiler_errors.log
1. ERROR in C:\...\XYZDM_1510179850748\XYZ\src\it\eng\spagobi\meta\ABC.java (at line 1)
package it.eng.spagobi.meta;
^
The type java.io.ObjectInputStream cannot be resolved. It is indirectly referenced from required .class files

Has anyone an idea what could be wrong?

I tried the steps in linux and windows (both 64bit) with the same result.
DB is Oracle 11g
I found a similar thread in the forum but it is old and was not answered.
Hope somebody can help this time.

Thank you
H.

Solved it myself. As mentioned, the source for the datamodel were tables from the oracle database. Seems that SpagoBI cannot handle the data type DECIMAL for some of the imported columns.
After I changed them do DOUBLE the Datamodel uploaded without problems.
H.

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