Create UserFields second time

Question

Hi SBO-Forum,
I wrote code to create user defined table and fields - that works fine first time (DI API, version 2004A, C#).
I don't wrote code to remove this tables/fields automatically ... I made it manually.
I cleared my entries from tables OUTB, CUFD.
Running the code second time, to create the user defined tables and fields again, will occur the followng message (err code = -1):
"[CUFD] ,
'[Microsoft][ODBC SQL Server Driver][SQL Server]
Invalid object name 'Cannot add Field'.'"
Are there any other tables to clean, so that I'm able to create table/fields for a second time?
Sincerely,
Peter

Answer 1

Now I restored my database and didn't changed anything manually.
If I'm running the sample 'MasterDataUDO.vb' ... everything is ok, also at second time.
But I can't run my own code creating table/fields ... also not at first time! (So the Subject of this post is wrong!).
Adding of fields will fail with the message:
"Invalid object name 'Cannot add Field'.'"
Belwo my C# code, any help is appreciated.
Peter
private bool AddField( string tab, string name, SAPbobsCOM.BoYesNoEnum must_exist, string descr, SAPbobsCOM.BoFieldTypes type, int size )
     SAPbobsCOM.UserFieldsMD oUserFieldMD = (SAPbobsCOM.UserFieldsMD)m_company.GetBusinessObject(SAPbobsCOM.BoObjectTypes.oUserFields);
     oUserFieldMD.Description = descr;
     oUserFieldMD.Name = name;
     oUserFieldMD.Type = type;
     oUserFieldMD.TableName = tab;
     if( type != SAPbobsCOM.BoFieldTypes.db_Date )
          oUserFieldMD.Size = size;
     oUserFieldMD.Mandatory = must_exist;
     if( must_exist == SAPbobsCOM.BoYesNoEnum.tYES )
          oUserFieldMD.DefaultValue = " "; // Not Null Field needs a default-value, otherwise error during creation of field
     try
          if( oUserFieldMD.Add() != 0 )
               m_company.GetLastError( out m_iErr, out m_sErr);
               m_gui.MessageBox( "Error Adding Field " + m_sErr, 0, "", "", "" );
               return false;
     catch( Exception ex )
          m_gui.MessageBox( ex.ToString(), 0, "", "", "" );
     System.Runtime.InteropServices.Marshal.ReleaseComObject(oUserFieldMD);
     return true;
Called from
AddField( "TIM_BE", "BE_ID", yes, "Liegenschaft", SAPbobsCOM.BoFieldTypes.db_Alpha, 8 );