Today I had this studio error:

Code:
D:\Programme\DataFlex 18.0\Bin\Studio.exe
COM Objekt Methoden Erklärungsfehler. Invalid CDS node handle
 
Error: 4399
 
Please report this error to Data Access Corporation
 
GET_COMGETNODETYPE (11826) - oCDS (3242) - at address 84195
GET_FIRSTTYPENODEUP (13062) - oCDSHelper (3244) - at address 102391
GET_FIRSTDISPLAYABLENODEUP (16744) - oPropertiesPanel (3241) - at address 213533
GET_PROPERTYPANELFILEMODE (16751) - oPropertiesPanel (3241) - at address 213815
MSG_UPDATEPROPERTYPANEL (16748) - oPropertiesPanel (3241) - at address 213642
MSG_ONCHANGECURRENTNODE (12550) - oPropertiesPanel (3241) - at address 213921
MSG_ONCHANGEFILEHANDLE (12642) - oPropertiesPanel (3241) - at address 91455
SET_PHOFILE (11981) - oPropertiesPanel (3241) - at address 91434
MSG_ONATTACHVIEW (12641) - oPropertiesPanel (3241) - at address 196305
MSG_ONATTACHVIEW (12641) - oPropertiesPanel (3241) - at address 213948
MSG_ADDDYNAMICVIEW (12555) - oFileVDF (3797) - at address 89556
MSG_ONOPENPANE (16235) - oPropertiesPanel (3241) - at address 196370
MSG_ONOPENPANE (16235) - oPropertiesPanel (3241) - at address 213968
GET_DOCKINGPANEACTION (1558) - oPropertiesPanel (3241) - at address 196276
[start] - at address 234523
What I did:

- changed the piColumnSpan Property of an cWebCombo Object
- Pressed F7 to open the WebApp Previewer.