BUCO transaction VCT load or version errors... (message R1895 or R1901...) : upgrade your saplogon to the last release, install Visu_SE_NET.exe requires Microsoft .NET Framework 4.5.1 and Microsoft Windows SDK v8.1 to be installed as a prerequisite. AND apply SAP Notes: 2767286 - ABA code changes for Visual Configuration Tool AND 2803249 - BUCO Transaction do not launch