Sales order - DictField object not initialised

Editing query and getting error when trying to display datasources to join to Sales orders?

Error
DictField object not initialised.

Stack trace
(C)\Classes\SysQueryBuilder\buildRelation - line 67
(C)\Classes\SysQueryBuilder\buildPopupMenuItem - line 49
(C)\Classes\SysQueryBuilder\buildPopupMenu - line 46
(C)\Classes\SysQueryBuilder\buildContext - line 12
(C)\Classes\SysQueryForm\dataSourceEdit - line 40
(C)\Forms\SysQueryForm\Designs\DesignList\DataSourceTree\Methods\context - line 14
(C)\Classes\FormRun\task
(C)\Forms\SysQueryForm\Methods\task - line 31
(C)\Classes\SysSetupFormRun\task - line 20

It is a bug in standard AX application. There is a fix:
Edit following method:
\Classes\SysQueryBuilder\buildRelation
Add variable declaration:

int             k, relLines;

Replace following line:

dictField   = _orgDictTable.fieldObject(dictRelation.lineExternTableValue(1));

With this code:

k       = 1;
relLines= dictRelation.lines();
do
{
    dictField   = _orgDictTable.fieldObject(dictRelation.lineExternTableValue(k));
    k++;
}
while (!dictField && k <= dictRelation.lines());

You can test result using following job:

static void testSysQueryBuilder(Args _args)
{
    Query                   q   = new Query(queryStr(SalesTableSelect));
    QueryRun                qr;
    SalesTable              salesTable;
    QueryBuildDataSource    qbds;
    
    
    qr  = new QueryRun(q);
    
    qr.prompt();
    
    qbds = qr.query().dataSourceTable(tableNum(SalesTable));
    
    while (qr.next())
    {
        salesTable = qr.get(tableNum(SalesTable));
    }
}

Problematic relation is for example with table PrintMgmtDocInstance (Print management document instance)

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