How work with fields like "string1.string2"

Migrateduser

<p>Hello!<br><br>
I work with BIRT v2.6 to build reports for IBM Jazz products. I have a data model where some field name is "targetTestPlan.itemId". But I can not get the value of this field in OnFetch event in the typical way (returned null):<br><br>
TPitem_db = row["targetTestPlan.itemId"];<br><br>
It must be mentioned that other fields with simple names are processed without a problem.<br><br>
Could somebody help me with this case? Is any way get the value of a field whose name includes point?<br><br>
Thank you very much in advance for any help and collaboration!</p>