I got:
Record Call Stack Sequence - Bottom line is error line.
ICommand_OnClick Line : 157
BuildNetwork D:\jhare's
documents\NHDFlowCheck\clsGeometricNetwork.cls
Line : 294
Error Number
-2147467259
Description
Item not found in this collection.
Record Call Stack Sequence - Bottom line is error line.
DeleteNetwork D:\jhare's
documents\NHDFlowCheck\clsGeometricNetwork.cls
Line : 440
Error Number
-2147467259
Description
The database engine could not lock table 'N_4_Props'
because it is already in use by another person or
process.
Record Call Stack Sequence - Bottom line is error line.
locateNetEnds D:\jhare's
documents\NHDFlowCheck\clsConnectionTable.cls
Line : 920
Error Number
13
Description
Type mismatch
After I tried to regenerate the geometric network after the
last error.