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error in fread (showProgress is not type integer but type 'logical'. Please report.) #1944

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demydd opened this issue Nov 30, 2016 · 3 comments
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@demydd
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@demydd demydd commented Nov 30, 2016

I have used fread to read data. But the error has arisen:

showProgress is not type integer but type 'logical'. Please report.

Here is the reproducible script:

library(data.table)
x <- "sgsddsfsfsf"
write.csv2(x,"check.csv", row.names=FALSE)
fread("check.csv", stringsAsFactor=FALSE)
@MichaelChirico
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@MichaelChirico MichaelChirico commented Nov 30, 2016

Try restarting R and running again. I can't reproduce your example (on v1.9.8):

library(data.table)
x <- "sgsddsfsfsf"
write.csv2(x,"check.csv", row.names=FALSE)
fread("check.csv", stringsAsFactor=FALSE)
#              x
# 1: sgsddsfsfsf

Can you give sessionInfo() if the problem still arises?

@demydd
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@demydd demydd commented Nov 30, 2016

@mattdowle
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@mattdowle mattdowle commented Nov 30, 2016

Looks like I'm to blame - sorry. I changed the type of the showProgress global option to logical for fwrite : eb9f7ef

There was a strange problem in the past almost identical : #1111

With fresh eyes I don't see why showProgress wasn't type logical in the first place throughout. Will fix.

In the meantime, passing showProgress=1L or 0L to fread() should work. It's strange it only causes a problem on Windows.

@mattdowle mattdowle added this to the v1.9.10 milestone Nov 30, 2016
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3 participants