One solution is using following batch code: off The syntax of the command ren is of course incorrect. This results in the following error message for each *.txt file found in current directory and all its subdirectories: That can be seen on debugging the batch file by running it from within a command prompt window instead of double clicking the batch file. So executed is the following on environment variable filename not already defined: for /R %f in (*.txt) do ( All environment variables using %.% syntax are expanded (replaced) already during this processing phase by the appropriate variable expansion result. The Windows command processor cmd.exe processes the entire command block starting with ( and ending with matching ) before executing command FOR at all. Open a command prompt, run set /? and read the output help carefully and completely from top of first to bottom of last page, especially the section about delayed expansion explained also by Variables are not behaving as expected. txt" in the working directory, which I realise wasn't the best choice of filename. Note: I have a filename called "filename. Can someone please help point me in the right direction? Thanks in advance. If I run the below code exactly 3 times in the same command prompt, the code works perfectly fine (I assume because all variables are now set correctly). It must be how the for loop operates in a batch script. ![]() Interestingly enough, if I were to run the command again in the same prompt, line3 then works (filename variable is read correctly). But on line3, I don't get the value I've stored in line2. ![]() The filename is detected correctly by line2. Although most of the parts of the code seems to work in isolation, I get an error when running the code together. I'm trying to write a batch script that'll read all the pdf files in a folder and rename them such that there are no spaces in them.
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