# MOJO Type Mismatch - Charles Yeoman's code **URL:** \ **Category:** General\ **Created:** [November 26, 2016, 4:18am UTC](https://forum.xojo.com/t/mojo-type-mismatch-charles-yeomans-code/34648 "2016-11-26T04:18:05Z")\ **Posts on this page:** 14\ **Page:** 1
**Author:** ![Joseph\_Claeys](https://forum.xojo.com/user_avatar/forum.xojo.com/joseph_claeys/32/1104_2.png) [@Joseph\_Claeys](https://forum.xojo.com/u/Joseph_Claeys)\ **Post date:** [November 26, 2016, 4:18am UTC](https://forum.xojo.com/t/mojo-type-mismatch-charles-yeomans-code/34648/1 "2016-11-26T04:18:05Z")
I was checking out the UUID code from [Charles Yeomans MOJO code](https://github.com/declaresub/mojo) and it noticed it wouldn’t compile. I don’t write much introspection code so the error isn’t obvious to me. [Relevant Code](http://imgur.com/E6kL7Oo) Evidently it’s a type mismatch but from what I can tell they’re both “typeinfo.” [Error](http://imgur.com/a/QTs98) ---
**Author:** ![Eli\_Ott](https://forum.xojo.com/letter_avatar_proxy/v4/letter/e/5f8ce5/32.png) [@Eli\_Ott](https://forum.xojo.com/u/Eli_Ott)\ **Post date:** [November 26, 2016, 5:00am UTC](https://forum.xojo.com/t/mojo-type-mismatch-charles-yeomans-code/34648/2 "2016-11-26T05:00:20Z")
I cannot open the two links pointing to [imager.com](http://imager.com), but my assumption would be that you have a Using Xojo.Introspection clause somewhere in code or in the navigator, while Mojo is not based on the new framework. ---
**Author:** ![DaveS](https://forum.xojo.com/letter_avatar_proxy/v4/letter/d/848f3c/32.png) [@DaveS](https://forum.xojo.com/u/DaveS)\ **Post date:** [November 26, 2016, 5:01am UTC](https://forum.xojo.com/t/mojo-type-mismatch-charles-yeomans-code/34648/3 "2016-11-26T05:01:11Z")
```auto FUNCTION UUID() as String Dim result As String #If TargetCocoa Soft Declare Function NSClassFromString Lib "Cocoa" ( clsName As cfstringref ) As ptr Soft Declare Function UUID Lib "Cocoa" selector "UUID" ( clsRef As ptr ) As ptr Soft Declare Function UUIDString Lib "Cocoa" selector "UUIDString" ( obj_id As ptr ) As cfstringref Dim classPtr As Ptr = NSClassFromString( "NSUUID" ) Dim NSUUID As ptr = UUID( classPtr ) result = UUIDString( NSUUID ) #ElseIf TargetWin32 Const kLibName = "win32.Rpcrt4" Soft Declare Function UUIDCreate Lib kLibName alias "UuidCreate" ( ByRef uuid As WindowsUUID ) As Integer Soft Declare Function UUIDToString Lib kLibName alias "UuidToStringA" ( ByRef inUUID As WindowsUUID, ByRef outString As CString ) As Integer Dim uuid As WindowsUUID // Structure [x(15) as UInt8] Dim out As CString result = out result = result.DefineEncoding( Encodings.UTF8 ) result = result.Uppercase #EndIf Return result END FUNCTION ``` ---
**Author:** ![Joseph\_Claeys](https://forum.xojo.com/user_avatar/forum.xojo.com/joseph_claeys/32/1104_2.png) [@Joseph\_Claeys](https://forum.xojo.com/u/Joseph_Claeys)\ **Post date:** [November 26, 2016, 12:52pm UTC](https://forum.xojo.com/t/mojo-type-mismatch-charles-yeomans-code/34648/4 "2016-11-26T12:52:56Z")
> [@300096:@Eli Ott](#): > > I cannot open the two links pointing to [imager.com](http://imager.com) That’s strange. They open up fine for me. Are you on mobile? ---
**Author:** ![Joseph\_Claeys](https://forum.xojo.com/user_avatar/forum.xojo.com/joseph_claeys/32/1104_2.png) [@Joseph\_Claeys](https://forum.xojo.com/u/Joseph_Claeys)\ **Post date:** [November 26, 2016, 12:54pm UTC](https://forum.xojo.com/t/mojo-type-mismatch-charles-yeomans-code/34648/5 "2016-11-26T12:54:06Z")
Thanks for the code Dave. However, I was looking for something that would work across all the platforms including the Web (linux) and mobile. ---
**Author:** ![Michel\_Bujardet](https://forum.xojo.com/user_avatar/forum.xojo.com/michel_bujardet/32/252_2.png) [@Michel\_Bujardet](https://forum.xojo.com/u/Michel_Bujardet)\ **Post date:** [November 26, 2016, 1:57pm UTC](https://forum.xojo.com/t/mojo-type-mismatch-charles-yeomans-code/34648/6 "2016-11-26T13:57:08Z")
At least iOS won’t give you access to the UUID anymore for security reasons. You may have to settle for the MAC address. ---
**Author:** ![DaveS](https://forum.xojo.com/letter_avatar_proxy/v4/letter/d/848f3c/32.png) [@DaveS](https://forum.xojo.com/u/DaveS)\ **Post date:** [November 26, 2016, 3:39pm UTC](https://forum.xojo.com/t/mojo-type-mismatch-charles-yeomans-code/34648/7 "2016-11-26T15:39:49Z")
[quote=300146:@Michel Bujardet]At least iOS won’t give you access to the UUID anymore for security reasons. You may have to settle for the MAC address.[/quote] MIchel … would you care to expand upon that statement? there is nothing stopping you from generating a UUID with iOS, just need the correct band-aid (I mean declare) for Xojo In Swift and ObjC it is REALLY difficult to to ```auto let uuid = UUID().uuidString // THIS IS NOT XOJO CODE... DO NOT PASTE INTO YOU XOJO PROJECT!!!!!! ``` ---
**Author:** ![Tim\_Parnell](https://forum.xojo.com/user_avatar/forum.xojo.com/tim_parnell/32/161_2.png) [@Tim\_Parnell](https://forum.xojo.com/u/Tim_Parnell)\ **Post date:** [November 26, 2016, 4:20pm UTC](https://forum.xojo.com/t/mojo-type-mismatch-charles-yeomans-code/34648/8 "2016-11-26T16:20:08Z")
I think he’s talking about the device UUID. ---
**Author:** ![DaveS](https://forum.xojo.com/letter_avatar_proxy/v4/letter/d/848f3c/32.png) [@DaveS](https://forum.xojo.com/u/DaveS)\ **Post date:** [November 26, 2016, 4:32pm UTC](https://forum.xojo.com/t/mojo-type-mismatch-charles-yeomans-code/34648/9 "2016-11-26T16:32:24Z")
> [@300161:@Tim Parnell](#): > > I think he’s talking about the device UUID. ah… good point… my brain (and the code I posted) was to CREATE a UUID ---
**Author:** ![Michel\_Bujardet](https://forum.xojo.com/user_avatar/forum.xojo.com/michel_bujardet/32/252_2.png) [@Michel\_Bujardet](https://forum.xojo.com/u/Michel_Bujardet)\ **Post date:** [November 26, 2016, 4:49pm UTC](https://forum.xojo.com/t/mojo-type-mismatch-charles-yeomans-code/34648/10 "2016-11-26T16:49:51Z")
I was talking indeed about the device UUID. Besides, getting that information from a Web app is AFAIK completely impossible anyway. ---
**Author:** ![Norman\_P](https://forum.xojo.com/letter_avatar_proxy/v4/letter/n/858c86/32.png) [@Norman\_P](https://forum.xojo.com/u/Norman_P)\ **Post date:** [November 26, 2016, 6:36pm UTC](https://forum.xojo.com/t/mojo-type-mismatch-charles-yeomans-code/34648/11 "2016-11-26T18:36:28Z")
Change that one line into dim TestableClasses() as Introspection.TypeInfo TestableClasses.Append GetTypeInfo(mojo.UUID) ---
**Author:** ![Joseph\_Claeys](https://forum.xojo.com/user_avatar/forum.xojo.com/joseph_claeys/32/1104_2.png) [@Joseph\_Claeys](https://forum.xojo.com/u/Joseph_Claeys)\ **Post date:** [November 26, 2016, 7:25pm UTC](https://forum.xojo.com/t/mojo-type-mismatch-charles-yeomans-code/34648/12 "2016-11-26T19:25:01Z")
Norman FTW. ---
**Author:** ![Norman\_P](https://forum.xojo.com/letter_avatar_proxy/v4/letter/n/858c86/32.png) [@Norman\_P](https://forum.xojo.com/u/Norman_P)\ **Post date:** [November 26, 2016, 7:41pm UTC](https://forum.xojo.com/t/mojo-type-mismatch-charles-yeomans-code/34648/13 "2016-11-26T19:41:02Z")
\<[https://xojo.com/issue/46009](https://xojo.com/issue/46009)\> ---
**Author:** ![system](https://forum.xojo.com/uploads/default/original/1X/455b4dcc0e61630e9f81940004ddffa49c432a46.png) [@system](https://forum.xojo.com/u/system)\ **Post date:** [October 29, 2020, 6:33pm UTC](https://forum.xojo.com/t/mojo-type-mismatch-charles-yeomans-code/34648/14 "2020-10-29T18:33:46Z")