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SSSOCPaulCote avatar SSSOCPaulCote commented on August 16, 2024 1

@konimarti setting GOARCH to 386 worked. Thank you for responding. I'll close this issue!

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SSSOCPaulCote avatar SSSOCPaulCote commented on August 16, 2024

Investigating and it might have to do with NewAutomationObject method in connection_windows.go. At line 223, you declare a pointer of type ole.IUnknown as such var unknown *ole.IUknown but maybe anytime you declare a pointer, you should do it this way var unknown *ole.IUnknown = new(ole.IUnknown) based on this article

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SSSOCPaulCote avatar SSSOCPaulCote commented on August 16, 2024 
goroutine 1 [running]:
github.com/go-ole/go-ole.(*IDispatch).VTable(...)
        C:/Users/<redacted>/go/pkg/mod/github.com/go-ole/[email protected]/idispatch.go:18
github.com/go-ole/go-ole.getIDsOfName(0x0, {0xc0000cf7c8, 0x1, 0x12994c40598})
        C:/Users/<redacted>/go/pkg/mod/github.com/go-ole/[email protected]/idispatch_windows.go:20 +0xc8
github.com/go-ole/go-ole.(*IDispatch).GetIDsOfName(...)
        C:/Users/<redacted>/go/pkg/mod/github.com/go-ole/[email protected]/idispatch.go:22
github.com/go-ole/go-ole.(*IDispatch).GetSingleIDOfName(0xac4ea5, {0xcea9a4, 0x9bd487})
        C:/Users/<redacted>/go/pkg/mod/github.com/go-ole/[email protected]/idispatch.go:47 +0x3b
github.com/go-ole/go-ole.(*IDispatch).InvokeWithOptionalArgs(0xc0000cf8b8, {0xcea9a4, 0x0}, 0x8, {0xc0000cf8a8, 0x1, 0x1})
        C:/Users/<redacted>/go/pkg/mod/github.com/go-ole/[email protected]/idispatch.go:63 +0x3b
github.com/go-ole/go-ole/oleutil.CallMethod(...)
        C:/Users/<redacted>/go/pkg/mod/github.com/go-ole/[email protected]/oleutil/oleutil.go:51
github.com/konimarti/opc.(*AutomationObject).GetOPCServers(0x0, {0xc00001a0d0, 0xc0000cf9b8})
        C:/Users/<redacted>/go/src/github.com/konimarti/opc/connection_windows.go:183 +0x88
main.listCommand(0xc0000f4160)

Or maybe it's the go-ole package that needs to fix some pointer dereferencing issue.

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konimarti avatar konimarti commented on August 16, 2024

Did you go through the Troubleshooting section? Try setting the architecture to $ENV:GOARCH="386" in Powershell and compile everything again. Most of the time, this is the issue or a wrong ProgID. Also, please add opc.Debug() before the opc.NewConnection call to print more debug-related information.

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