Reporting as requested by the error message:

C:\Program Files (x86)\DataFlex 18.0\Bin\Studio.exe
COM object method invocation error. Invalid CDS node handle

Error: 4399

Please report this error to Data Access Corporation

GET_COMGETNODE (11825) - oCDS (3172) - at address 84214
MSG_LOADTREE (16268) - oTree (3206) - at address 208248
MSG_ONCREATETREE (7426) - oTree (3206) - at address 207888
MSG_DOINITWINDOW (7377) - oTree (3206) - at address 34728
MSG_PAGE_OBJECT (4) - oTree (3206) - at address 35310
MSG_ADD_FOCUS (279) - oTree (3206) - in native code
MSG_ADD_FOCUS (279) - oDDOExplorer (3171) - in native code
MSG_ACTIVATE (117) - oDDOExplorer (3171) - in native code
MSG_ACTIVATE (117) - oDDOExplorer (3171) - at address 1947
MSG_POPUP (290) - oDDOExplorer (3171) - in native code
[start] - at address 234938


I had just closed the program in the debugger and clicked on the DDO Explorer tab in the studio and got the above message. On clicking "OK" I got this message:

C:\Program Files (x86)\DataFlex 18.0\Bin\Studio.exe
Illegal Datatype Conversion

Error: 4381

Please report this error to Data Access Corporation

MSG_LOADTREE (16268) - oTree (3206) - at address 208248
MSG_ONCREATETREE (7426) - oTree (3206) - at address 207888
MSG_DOINITWINDOW (7377) - oTree (3206) - at address 34728
MSG_PAGE_OBJECT (4) - oTree (3206) - at address 35310
MSG_ADD_FOCUS (279) - oTree (3206) - in native code
MSG_ADD_FOCUS (279) - oDDOExplorer (3171) - in native code
MSG_ACTIVATE (117) - oDDOExplorer (3171) - in native code
MSG_ACTIVATE (117) - oDDOExplorer (3171) - at address 1947
MSG_POPUP (290) - oDDOExplorer (3171) - in native code
[start] - at address 234938