Cannot send message with Public Mobile - error 42

[jp2]

Hello, when I try to send a SMS to this one number is try for a couple minutes then a message pops up at the bottom of my screen saying "Cannot send message with public mobile - error 42" does anyone know what that means or why it's happening? 

[dust2dust]

Is this to an international - non-US/Canada - number?

[dabr]

@jp2   Try adding 1 in front of the number although it should not be necessary but worth a try?

[kb_mv]

@jp2  Maybe try +1 or +011 in front. Is the number international?

[jp2]

@dust2dust no it is a Canadian number 

[jp2]

All other numbers work that I text.

I already have a +1 in front of the number as this is a contact I've texted multiple times before. I'm more looking for what error 42 means because I'm trying to troubleshoot their phone.

[softech]

@jp2 what kind of number is that? is that a personal phone? what area code is that?

[kb_mv · Accepted solution]

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@jp2 wrote:

All other numbers work that I text.

I already have a +1 in front of the number as this is a contact I've texted multiple times before. I'm more looking for what error 42 means because I'm trying to troubleshoot their phone.

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@jp2 I have seen references elsewhere to it having to do with the recipient inadvertently blocked texts from a number resulting in this error code. As an aside apparently you can block only texts and not calls from a number, though I haven't looked to far into that.

[jp2]

Yes, it's a personal number same area code as me. Alberta

[dust2dust]

I wouldn't be sure it's their phone. How often have you been trying and over how long a period of time? Maybe backup the conversation if you want to keep it and then delete it and try again.