issue with accessing the image stored at a particular repository.

Hello Sikuli Team,

i have created a repository for my project and wants to access all the snapshots from one place.
in one code i am checking for the existence of 2 images on the screen.
it's surprising for me that my code worked for the first image but not for the second one.
it says:
"E:\Repository\abc.png" looks like a file, but not on disk. Assumes it's text."

kindly help me to solve this.