Ruby invalid multibyte char error (Sep 2019)

Question

My script fails on this bad encoding, even I brought all files to UTF-8 but still some won't convert or just have wrong chars inside.

It fails actually on var assignment step.

Can I set some kind of error handling for this case like below so my loop will continue. That ¿ causes all problem.

Need to run this script all the way without errors. Tried already encoding und force_encoding and shebang line. Is Ruby has any kind of error handling routing so I can handle that bad case and continue with the rest of script? How to get rid of this error invalid multibyte char (UTF-8)

line = '¿USE [Alpha]' lineOK = ' USE [Alpha] OK line' >ruby ReadFile_Test.rb ReadFile_Test.rb:15: invalid multibyte char (UTF-8)

Running your code does not show any error to me. Also, it is not clear to me what you want to archieve ... — Christian
– Christian, Commented Sep 6, 2019 at 22:59
Have you tried to force encoding to UTF-8 e.g. line.force_encoding(Encoding::UTF_8) — jamesc
– jamesc, Commented Sep 7, 2019 at 1:20
Another option might be to convert to binary, then to ascii replacing invalid chars with something meaningful or with a space even `force_encoding('BINARY').encode('ASCII', :invalid => :replace, :undef => :replace, :replace => ' ') — jamesc
– jamesc, Commented Sep 7, 2019 at 1:29
@Christian, how you manage run it OK) on what version, what the trick? I am on Windows. Anybody else getting an error like me ? Tx — Mich28
– Mich28, Commented Sep 9, 2019 at 14:31

Christian · Accepted Answer · 2019-09-10 10:48:58Z

I could reproduce your issue by saving the file with ISO-8859-1 encoding.

Running your code with the file in this non UTF8-encoding the error popped up. My solution was to save the file as UTF-8.

I am using Sublime as text editor and there is the option 'file > save with encoding'. I have chosen 'UTF-8' and was able to run the script.

Using puts line.encoding showed me UTF-8 then and no error anymore.

I suggest to re-check the encoding of your saved script file again.

Thanks Christian, yes once I save my test file in UTF-8 it worked OK. I used ScITE, though it was not original problem, as this string came after read file, which has that char. I will check now how it work with File.read in script saved as UTF. Tx Much

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