[Java] FindFailed with Pattern().similar(0.7) on the screen

The usual way to do this is:
Screen scr = new Screen();
Match m = scr.find("E:\\TestSikuli\\nav.JPG");

But is it really a JPG file?

Sikuli in the standard uses .png files, I am not sure, wether JPG's work too.

Hi Raiman !
Thnx for the swift response . I have chnged my code like this :

Screen screen= new Screen();

    try{
     Match match=screen.find("E:\\TestSikuli\\nav.png");

     screen.click(match);

(I have even chnged the type of the image)

Still I end up getting the following error :

FindFailed: can not find E:\TestSikuli\nav.png on the screen.
Line ?, in File ?
 at org.sikuli.script.Region.handleFindFailed(Region.java:420)
 at org.sikuli.script.Region.wait(Region.java:511)
 at org.sikuli.script.Region.find(Region.java:381)
 at com.SampleRead.main(SampleRead.java:31)

Please Help!

Ok, then this means:

your image E:\TestSikuli\nav.png is not visible (or cannot be matched caused by other reasons) on the screen in the moment, the find operation is processed.

Another possibility is to just try out the

find("E:\\TestSikuli\\nav.png")

in Sikuli IDE, only to be sure.

Raiman !
I have tried the following snippet from the sikuli IDE

find("E:\\TestSikuli\\nav.png")

The following is the stack trace I have encountered with :

[error] nav.png looks like a file, but can't be found on the disk. Assume it's text.
[info] Text Recognizer inited.

[error] Stopped
[error] An error occurs at line 2
[error] Error message: Traceback (most recent call last):
 File "C:\Users\USER\AppData\Local\Temp\sikuli-tmp7981583417362119709.py", line 2, in
 find("nav.png")
Line 3, in file C:\Users\USER\AppData\Local\Temp\sikuli-tmp7981583417362119709.py

 at org.sikuli.script.Region.handleFindFailed(Region.java:420)
at org.sikuli.script.Region.wait(Region.java:511)
at org.python.proxies.sikuli.Region$Region$0.super__wait(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)

org.sikuli.script.FindFailed: FindFailed: can not find nav.png on the screen.
 Line 3, in file C:\Users\USER\AppData\Local\Temp\sikuli-tmp7981583417362119709.py

Please suggest !

check that the image is really stored at:

E:\TestSikuli\nav.png

and that the access rights are sufficient.