Forum Discussion
M query Expression.Error: Illegal characters in path when using parameters into File.Contents
I'm trying to use a parameters in Power BI M query to open a file
File.Contents(paramfolderName & fileName)
paramfolderName : Parameter in Power BI-> C:\Temp\
fileName: a text value from a query ->somefile.csv
I then get this errormessage:
Expression.Error: Illegal characters in path.
Details:
C:\Temp\somefile.csv
When I change the logic to use the folderName and fileName explicit it works as I expect
File.Contents("C:\Temp\somefile.csv")
Any tips?
2 Replies
Hi Anonymous , I had a similar error when I assigned the parameter the path with " (double quotes) in it.
Example:
let filepath be the parameter name. Then,
filepath ="C:\Temp\somefile.csv" will throw this error. --> this happened because I was doing "Copy as Path" in Windows 11 and pasting it directly as a value for the parameter.
However, filepath=C:\Temp\somefile.csv will work - notice that there is no " in the path value.
Hope this helps.
Agree, that looks strange.
Try the following:
File.Contents(Text.Clean(paramfolderName & fileName))
