Bamboo assumes the windows batch script as an executable when running infile script task

Step to reproduce

1. Create a simple batch file and place it in the plan root repository
2. Create an inline script task as per the screenshot below:
   
3. Run a build and the following errors will be shown in the log:

   Unable to find executable at xxxx.bat
   

4. See screenshot
   

Workaround
Specify the full path of the directory where the batch file is placed.