C1.C1Report.2 versions conflicts

C1.C1Report.2 versions conflicts

Posted by: enrique.pv-ext on 16 February 2026, 11:15 am EST

• 

  enrique.pv-ext

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  Posted 16 February 2026, 11:15 am EST

  Hi all,
  
  using C1.C1Report.dll in a ASP NET NET Framework 4.8.1 in WAP project
  
  ComponentOne 2010v1 for WebForms.

  Assemblies:

  C:\GIT\repos\MYPROJ\libs\ComponentOne\3.5\C1.C1Report.2.dl
  C:\GIT\repos\MYPROJ\libs\ComponentOne\3.5\C1.Win.C1Report.2.dll
  C:\GIT\repos\MYPROJ\libs\ComponentOne\3.5\C1.Web.C1WebReport.2.dll

  C1.C1Report.2, Version=2.6.20093.53207
  
  vs
  
  C1.C1Report.2, Version=2.6.20102.54116

  warning MSB3277: Se han encontrado conflictos entre distintas versiones de "C1.C1Report.2" que no se han podido resolver.
  warning MSB3277: Existía un conflicto entre "C1.C1Report.2, Version=2.6.20093.53207, Culture=neutral, PublicKeyToken=594a0605db190bb9" 
  y "C1.C1Report.2, Version=2.6.20102.54116, Culture=neutral, PublicKeyToken=594a0605db190bb9".
  warning MSB3277:     Se eligió "C1.C1Report.2, Version=2.6.20093.53207, Culture=neutral, PublicKeyToken=594a0605db190bb9" porque era principal y "C1.C1Report.2, Version=2.6.20102.54116, Culture=neutral, PublicKeyToken=594a0605db190bb9" no lo era.
  warning MSB3277:     Referencias que dependen de "C1.C1Report.2, Version=2.6.20093.53207, Culture=neutral, PublicKeyToken=594a0605db190bb9" [C:\GIT\repos\MYPROJ\libs\ComponentOne\3.5\C1.C1Report.2.dll].
  warning MSB3277:         C:\GIT\repos\MYPROJ\libs\ComponentOne\3.5\C1.C1Report.2.dll
  warning MSB3277:           Atributos Include de elementos de archivo del proyecto que provocaron la referencia "C:\GIT\repos\MYPROJ\libs\ComponentOne\3.5\C1.C1Report.2.dll".
  warning MSB3277:             C1.C1Report.2
  warning MSB3277:             C1.Web.C1WebReport.2
  warning MSB3277:         C:\GIT\repos\MYPROJ\libs\ComponentOne\3.5\C1.Web.C1WebReport.2.dll
  warning MSB3277:           Atributos Include de elementos de archivo del proyecto que provocaron la referencia "C:\GIT\repos\MYPROJ\libs\ComponentOne\3.5\C1.Web.C1WebReport.2.dll".
  warning MSB3277:             C1.Web.C1WebReport.2
  warning MSB3277:     Referencias que dependen o se han unificado para "C1.C1Report.2, Version=2.6.20102.54116, Culture=neutral, PublicKeyToken=594a0605db190bb9" [].
  warning MSB3277:         C:\GIT\repos\MYPROJ\libs\ComponentOne\3.5\C1.Win.C1Report.2.dll
  warning MSB3277:           Atributos Include de elementos de archivo del proyecto que provocaron la referencia "C:\GIT\repos\MYPROJ\libs\ComponentOne\3.5\C1.Win.C1Report.2.dll".
  warning MSB3277:             C1.Win.C1Report.2
  

  any suggestions ?

• 

  uttkarsh.matiyal

  

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  Posted 18 February 2026, 1:42 am EST

  Hello Enrique,

  To fix the version conflict, please make sure that all ComponentOne assemblies used in your project are from the exact same build/version set. Mixed versions of C1 DLLs commonly lead to MSB3277 warnings.

  Kindly review all C1 DLLs in the folder:
  
  

  C:\GIT\repos\MYPROJ\libs\ComponentOne\3.5

  
  
  and verify that every file belongs to the same version. If you find any DLL with a different version number, replace it with the matching version so the entire set is consistent. Also check that no transitive project reference is pulling in a different build of the same assembly.

  You can download matching builds from the official ComponentOne prerelease archive to obtain the correct DLL versions: https://prerelease.componentone.com/allfiles

  If the issue continues, please share the following so we can investigate further:

  1. A zipped copy of all DLLs under ‘C:\GIT\repos\MYPROJ\libs\ComponentOne\3.5’
  2. Your project file (*.csproj or *.vbproj) so we can review the assembly references
  3. A zipped copy of all C1 DLLs from the project’s bin folder

  Regards,
  
  Uttkarsh.