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Suggested answer

more than one form was opened at once for the lookup control

Posted on by Microsoft Employee


in ax7 i have created form 

ds - vendtrans

i have created field payment destination

where i used the override method lookup

inside which the code below is there,

when i run the form ..when i select the value from lookup it throws the error

"more than one form was opened at once for the lookup control".

Query query;
QueryBuildDataSource qbds;
QueryBuildRange qbr;
SysTableLookup lookup;

query = new Query();
qbds = query.addDataSource(tableNum(VendTrans));
qbr = qbds.addRange(fieldNum(VendTrans,AccountNum));

lookup = SysTableLookup::newParameters(tableNum(VendTrans),PaymentDestination,true);
lookup.addLookupField(fieldNum(VendTrans, AccountNum), true);


  • Suggested answer
    Chaitanya Golla Profile Picture
    Chaitanya Golla 17,225 on at
    RE: more than one form was opened at once for the lookup control


    Please update your code with following changes and try your lookup:

    Replace lookup.addLookupField(fieldNum(VendTrans, AccountNum), true); statement with

    lookup.addLookupField(fieldNum(VendTrans, AccountNum)); and remove call to super();

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