[datatable-help] Weird error in package with older data.table version

[Matt Dowle]

What do you mean by older data.table version, which one?  Can you 
upgrade to v1.9.2?

 > Therefore this column gets bumped and the program stops.

It shouldn't stop.  It should bump the column and continue. That's what 
happens for me.  Could be a bug then,  which is why it's confusing 
talking about an older version of data.table. Thinking about it, maybe 
those bump warning messages should be downgraded to verbose=TRUE 
output.    It might be stopping if you've set options(warn=2).

Matt

On 14/03/14 12:01, Simon Zehnder wrote:
> My idea below made everything work … problem solved.
>
> Best
>
> Simon
>
> On 13 Mar 2014, at 09:18, Simon Zehnder <szehnder at uni-bonn.de> wrote:
>
>> Ok, what I found out so far is the following:
>>
>> Column 9 (containing characters in the .csv-file) is read first as LGL (logical I think) because the character in the first rows of this column is just ’T’ (and ‘fread' reads T/True/TRUE as TRUE). After some lines there comes a ‘C’ and now this column cannot be anymore logical (LGL) but has to be character. Therefore this column gets bumped and the program stops.
>>
>> As the ordering of columns can change in my package I need to tell ‘fread', that it should not consider LGL at all - is that possible? I would like to avoid to bother the user by asking him to provide colClasses.
>>
>> My data sample is always the TRACE data but I cannot know what variables of the TRACE data a user has retrieved. So my only idea to avoid the above mentioned error in my fread would be:
>>
>> 1. Read column names via ’scan’.
>>
>> 2. Check what variables are in and then choose via key/value pairs the appropriate colClasses and use them in ‘fread’.
>>
>> Any other suggestions?
>>
>>
>> Best
>>
>> Simon
>>
>> On 12 Mar 2014, at 20:28, Simon Zehnder <szehnder at uni-bonn.de> wrote:
>>
>>> I am having a weird error in a package I wrote some time ago with an older data.table version. ‘fread’ gives:
>>>
>>> Internal error: attempt to bump from type 0 to type 1. Please report to datatable-help
>>>
>>> The data is the same that I read in before. Any ideas?
>>>
>>>
>>> Best
>>>
>>> Simon
>>>
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