Some times we need to generate lot Id by code in axapta 4.0 or 2009. following are code you can set in your program too.     NumberSeq      _numberSeq;     salesline salesline;    ;    _numberSeq=NumberSeq::newGetNumFromCode(NumberSequenceReference::find(TypeId2ExtendedTypeId(typeid(InventTransId))).NumberSequence);    salesline.InventTransId=_numberSeq.num();     Just you need to pass Extended data type InventTransId to given function I hope this method or code will help you.  
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