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Take a look for some of these solutions https://www.b4x./?query=given+key+present Change your subject to: "given key was not present in the dictionary", that way more people can help you (si pones el asunto en español mucha gente no va a entenderlo)
link: Thanks. Done!
link: Hi, I formatted my computer. When I reinstall B4R get an error : "La clave proporcionada no se encontró en el diccionario". It occurs when I select ta
link: If you got the solution, please post what it was, that way you can help others. Change the subject with the prefix: " given key was not present in th

Hi, im new using b4r. When i try to select board from tools menu then i get this message "The given key was not present in the dictionary" What should i do? Thanks
link: Here the screenshots
link: Can you post a screenshot of Tools - Configure Paths?

Hello. I'm trying to open B4A but I keep getting this message 143209
link: Check the b4a file with a text editor. It might be corrupt.
link: Try: Tools->Clean Project, then compile it again

Well, the compiler is obviously having a problem with the name "CompleteJob", so the first thing that I would try would be to change this subroutine name and see if I got any better information.
link: Exception: Error compiling program. Error description: The given key was not present in the dictionary. Error occurred on line: 152 Sub CompleteJob(Ta
link: Hello, I have this error and I cannot compile. I get this Error Message: B4A Version: 12.80 Parsing code. (0.24s) Java Version: 11 Building
link: Check the Similar Threads at bottom of this page. Another cause may be due to corrupted .b4a file. You may need to use your backup. https://www.b4x.

Ok. What am I looking for?
link: Just curious as to what this error means and why it's happening. I know I'm pushing a few limits by trying to use B4J on Win 10 ARM (running in a Qemu
link: The b4j file is expected to include a few header attributes at the top. Open it with a text editor and check its content.

Hi, B4A 10.2, OpenJDK, Windows 10 Pro French, when opening a sample project (the one related to the B4XPages, three pages and a canvas where we draw random colors), I got the error : the given key was not present in the dictionary. Attached a screenshot. 100665 I was not doing anything, just opening
link: Sometimes it happens to me too and I have Windows 7 and Java 8. Not only I can run the project without any problems, but if I close and reopen it the
link: What happens after this message? Are you able to run the project?

The error appears in the logs tab: System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary. at System.Collections.Generic.Dictionary`2.get_Item(TKey key) at B4J.Shared.ModulesSerialization.OpenProject(ProjectFile fileName1) i An error occurred. Err

Check the source files with a text editor. One of them is corrupted. Hopefully it is the meta file which you can delete.
link: Hello all, i got a big issue just now my pc stuck so i turn off my pc with the on/off button. When i restart my project can't open any more then come
link: Erel, text editor can't open the bas file. Any other way?

Hi Erel, I'm having a problem with this version of b4r. I'm getting "The given key was not present in the dictionary" when I try to select the board

If the file is empty then there is nothing that you can extract from it.
link: i have the same issue
link: Hello, My PC crashed and I can not open B4i project. I am getting the error message THE GIVEN KEY WAS NOT PRESENT IN THE DICTIONARY. I tried to op

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