Hi
In the advanced properties of the Fixed Width Input node, you can enable the option "FILENAME_FIELD" by entering a variable name, which will output the name of the file read.
For extracting the date, would recommend to use an expression node with something like this:
Considering file name is similar to "MyFile_180827.txt", 'NAME' is the variable name for File Name.
string dateFile
parse(NAME,'_',null,dateFile) dateFile = replace(dateFile,'.txt','')
vincent
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