Hola amigo @d.kelfkens buenas. I get a similar situation, i guess you are open 5 times the file to read 5 diferent sheets, what you can do is make an phyton script to open the excel file read the sheets names and close the file, then you can use ImportExcel node to read the data from each sheet in the list that you previosly get, this way you only open the file 1 time and clean the data. I’m not the autor of this script i let you also the original post, you can copy the code there!!
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