DWG export - lineweight missing

When exporting to CAD drawing (maptoacad, editable, with template) some polylines got the default lineweight of "0" although the Map display model assigns certain lineweights to them. In Map these lines displayed correctly. For the polylines affected the lineweight was set using an expression:

<Override>
 <SymbolName>LTYP20</SymbolName>
 <ParameterIdentifier>LINEWEIGHT</ParameterIdentifier>
 <ParameterValue>0.35 * 500</ParameterValue>
</Override>

To get the lineweight exported correctly one has to put the expression in brackets:

<Override>
 <SymbolName>LTYP20</SymbolName>
 <ParameterIdentifier>LINEWEIGHT</ParameterIdentifier>
 <ParameterValue>(0.35 * 500)</ParameterValue>
</Override>

Map 2103, Sp2