[erlang-questions] Why do I have to recompile erl files

[Donald Steven]

Thanks.

On 2/22/2019 12.30 PM, Sverker Eriksson wrote:
> A new ERTS can usually load beam files compiled with an older compiler
> at least a couple of major versions back.
>
> An old ERTS may not be able to load beam files compiled with a newer compiler
> as it may find futuristic instructions that it does not understand.
>
> We usually only do such changes between major versions.
>
>
> /Sverker, Erlang/OTP
>
>
> On fre, 2019-02-22 at 12:14 -0500, Donald Steven wrote:
>> Is it the case that beam files usually have to be recompiled when using
>> a newer OTP version?
>>
>> On 2/21/2019 7.02 PM, Luke Bakken wrote:
>>> Hi Donald,
>>>
>>> I suspect the different Erlang versions are causing this. Sometimes
>>> beam files are compatible, but I've found re-compilation is almost
>>> always required when moving between major versions.
>>>
>>> On Thu, Feb 21, 2019 at 3:46 PM Donald Steven <t6sn7gt@REDACTED> wrote:
>>>> My PC says: Erlang/OTP 20 [erts-0.9] [source] [64-bit] ...
>>>> My laptop says: My PC says: Erlang/OTP 18- [erts-7.3] [source] [64-bit]
>>>> ...
>>>>
>>>> On 2/21/2019 1.53 PM, Luke Bakken wrote:
>>>>> Hi Donald,
>>>>>
>>>>> I'm curious to know what the error is, and if you're using the same
>>>>> version of Erlang in both places.
>>>>>
>>>>> On Thu, Feb 21, 2019 at 4:11 AM Donald Steven <t6sn7gt@REDACTED> wrote:
>>>>>> When I take my work from my desktop to my laptop I have to recompile
>>>>>> some erl modules or I get an error (even though the beam files are
>>>>>> present and where they need to be and they're both modern Intel
>>>>>> Windows
>>>>>> machines).  What's going on?
>>>>>>
>>>>>>
>>>>>> Thanks.
>>>>>>
>>>>>>
>>>>>> Don
>>>>>>
>>>>>>
>>>>>> PS: I do use the WIndows Linux subsystem, but both computers are up to
>>>>>> date so I don' think there is any difference there either.
>>>>>>
>>>>>>
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