I'm also a bit fuzzy on the details, but I believe that you can fix
the corrupted files by opening them in a more recent DrRacket and then
saving them again (or copying and pasting them back to the original
DrRacket if necessary).

(Also, FWIW, v4.2 is older than Windows 7 ...)

Robby

On Thu, Oct 13, 2011 at 8:11 PM, Matthias Felleisen
<matth...@ccs.neu.edu> wrote:
>
> I believe that this is the broken version. It's so old I cannot really recall 
> the details. [Someone correct me if I am wrong.] The easiest fix is to 
> upgrade.
>
> For now, tell students not to insert images or graphical syntax into 
> drracket. Instead build images with the primitives.
>
> We will release a new version soon (5.2) and I urge you to upgrade to that 
> one as soon as your tech guy can handle it.
>
> -- Matthias
>
>
>
>
>
> On Oct 13, 2011, at 9:01 PM, Erwin Hildebrandt wrote:
>
>> With regards to the error below, we are using dr Scheme v4.2 (I know its an 
>> old version but the tech guys at my school take months to test every upgrade 
>> that we ask for) and we are running windows 7.
>>
>> I copied the entire error message below again:
>>
>>>> insert-file in text%  error loading file (read from file failed)  === 
>>>> context ===
>>
>>
>>
>> Thanks for your help
>>
>> Erwin
>>
>> On 12-Oct-11, at 7:12 PM, Matthias Felleisen wrote:
>>
>>>
>>> Hi -- this sounds like an old error from a couple of years ago.
>>>
>>> Which version of DrRacket (formerly DrScheme) are you using?
>>> Which OS? Or does this error happen across OSes?
>>>
>>> -- Matthias
>>>
>>> (p.s. I wouldn't be frustrated with the error message in this
>>> case but with the error. But if you face what I think it is,
>>> there is a remedy.)
>>>
>>>
>>> On Oct 12, 2011, at 8:02 PM, Erwin Hildebrandt wrote:
>>>
>>>> Hello
>>>>
>>>> I am teaching dr. Scheme to high school students and recently have had 
>>>> many students lose their work when their Scheme file cannot be opened.  
>>>> The error given is:
>>>>
>>>> insert-file in text%  error loading file (read from file failed)  === 
>>>> context ===
>>>>
>>>> Any ideas what is causing thi?.  It sometimes happens when they are 
>>>> inserting images they have found from the internet but it is not 
>>>> consistent.
>>>>
>>>> thanks
>>>>
>>>> Erwin Hildebrandt
>>>> River East Collegiate
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