When Julia doesn't recognize long file name.

[andyname]

Hello.
I've made file storage system by Julia. It is to save DataFrame format as a file. It's being saved through Serialize. However, Serialize makes an error when the file name is long. I think save and load sytem of JuliaDB has same problem. Long file name error. Here is an example. I'm using Julia 1.5.4 and 1.6.2 on windows 10.

#############
using Serialization

df=DataFrame(c1=[5,6,7])

folderName="C:\\ChamGo\\ADGOIMMUGYUL2_2_OIL_STS_SL01_WONCHEON\\WON_IDv1v36869vEPOCHMSv63602211600000v63602985600000\\WON_IDv1v36869vEPOCHMSv63602211600000v63602985600000\\WON_IDv1v36869vEPOCHMSv63602211600000v63602985600000"

mkpath(folderName)

fileName="C:\\ChamGo\\ADGOIMMUGYUL2_2_OIL_STS_SL01_WONCHEON\\WON_IDv1v36869vEPOCHMSv63602211600000v63602985600000\\WON_IDv1v36869vEPOCHMSv63602211600000v63602985600000\\WON_IDv1v36869vEPOCHMSv63602211600000v63602985600000\\WON_IDv1v36869vEPOCHMSv63602211600000v63602985600000.jls"

serialize(fileName,df)   ## It makes an error.

#############

fileName="C:\\ChamGo\\shortName.jls"

serialize(fileName,df)   ## It's not.

[barucden]

I suspect this is not an issue with Julia, but with Windows. Have you tried to create the file manually (e.g., from command line)? Did it work?

Windows defines the maximum length of a path and it is 260 characters. It should be possible to remove this limitation on Windows 10.

[andyname]

I've made a path on windows 10 manually by GUI interface and CMD as well. It works.

C:> mkdir C:\ChamGo1\ADGOIMMUGYUL2_2_OIL_STS_SL01_WONCHEON\WON_IDv1v36869vEPOCHMSv63602211600000v63602985600000\WON_IDv1v36869vEPOCHMSv63602211600000v63602985600000\WON_IDv1v36869vEPOCHMSv63602211600000v63602985600000

What I have tried.

[barucden]

This path has only 208 characters. The one that you included in the original code snippet had 264 (exceeding the windows limitation).
Try:

mkdir C:\ChamGo1\ADGOIMMUGYUL2_2_OIL_STS_SL01_WONCHEON\WON_IDv1v36869vEPOCHMSv63602211600000v63602985600000\WON_IDv1v36869vEPOCHMSv63602211600000v63602985600000\WON_IDv1v36869vEPOCHMSv63602211600000v63602985600000
\WON_IDv1v36869vEPOCHMSv63602211600000v63602985600000jls

[Seelengrab]

Related to #39774 - maximum allowable file name length is system dependent.

You seem to be on windows, which limits path lengths to 260 characters (see here and here for more info).

[andyname]

Thank you Guys! I've solved this problem. It was not a Julia issue. It was Windows. I've followed the links that you give to me, so I could edit registry. Now my Julia system recognize long file name.