SSL Error - question from Stack Overflow

Charles Warwick charles at
Thu Feb 18 19:36:01 EST 2021

This seems to be an issue which has come up a few times over the years with the curl library.

It appears to be specific to when curl is compiled on OS X to use the Mac SSL library, rather than OpenSSL.

I am guessing you are trying this on a Mac?

I have tested a build of tsNet under OS X that uses OpenSSL instead, and the issue goes away.  Unfortunately, building tsNet to use OpenSSL on Mac would mean that it no longer uses the OS X certificate store for verifying SSL certificates.



> On 17 Feb 2021, at 7:17 am, Richard Gaskin via use-livecode <use-livecode at> wrote:
> Devin Asay wrote:
>> I came across this question on stack overflow. I like to try to give good LiveCode answers there when I can, just to do a little to boost the reputation of the LC community there. But I don’t have a clue on this one.
>> <quote>
>> A Livecode script:
>> get URL ""
>> Winds up with the following in "the result":
>> tsneterr: (56) SSLRead() return error -9806
>> I tried setting libURLSetSSLVerification to both true and false, but got the same error each time. Any ideas why this is happening, and is there a solution?
>> </quote>
> As a cURL wrapper, tsNet's error messages tend to follow the same conventions other cURL devs see, lending itself to generic searches:
> I only briefly looked at a few of the results, but it seems related to a very specific SSL cert config that results in timeouts.  Beyond that you'll have to read more, but hopefully that link will at least get you started until Charles shows up with his usual thorough response.
> -- 
> Richard Gaskin
> Fourth World Systems
> Software Design and Development for the Desktop, Mobile, and the Web
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