Unable to load XXXX Add-In. Index was outside the bounds of the array.

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I have generated MS Visio Add-In and installed it.&nbsp; When loading the Visio 2016, I'm getting error 'Unable to load the XXXX Add-In.&nbsp; Index was outside the bounds of the Array', and the Add-In is not loaded in the Visio.&nbsp;I have installed Visio 2016 MSO (64-bit, version 16.0.4738.1000) and Visual Studio 2010 (64-bit, version 10.0.40219.1 SP1Rel) on a Windows 7 Professional (64-bit, version 6.1.7601)Please help me to resolve this.&nbsp;&nbsp;&nbsp;Code snippet :&nbsp;public void OnConnection(object application, Extensibility.ext_ConnectMode connectMode, object addInInst, ref System.Array custom){&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; try&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; mapXMLToVisio = new MyMapXMLToMicrosoftVisio();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; applicationObject = application;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; this.visioApplication = applicationObject as Microsoft.Office.Interop.Visio.Application;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; addInInstance = addInInst;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; catch (Exception e)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; MessageBox.Show("Unable to load the XXXX Add-in: " + e.Message);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp;Let me know if you need any further information.

thahir86 · Answer

thahir86&nbsp;Dear forum members/developers, do I have any update on this? I need to resolve this soon.

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Unable to load XXXX Add-In. Index was outside the bounds of the array.

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