Lookup using temporary table

I`m trying to create a custom lookup by building a temporary table and then show the result.

I able to do it with a normal table , but not a temp table.

Is it possible or not?

Thanks

    ttsbegin;

    BER_tmpDisplayComboLookup.itemid = 'aa bas';

    BER_tmpDisplayComboLookup.qtyDestination = 1234;

    BER_tmpDisplayComboLookup.qtySource = 1111;

    BER_tmpDisplayComboLookup.insert();

    ttscommit;

    qbdsBER_tmpDisplayComboLookup =  query.addDataSource(tableNum(BER_tmpDisplayComboLookup));

    sysTableLookup  = SysMultiTableLookup::newParameters(this, query);

    sysTableLookup.addLookupfield(fieldnum(BER_tmpDisplayComboLookup, itemid),1,true);

    sysTableLookup.performFormLookup();