Failed to compile Java source files

[INFO] :   Building Java source files: /Library/Java/JavaVirtualMachines/jdk1.8.0_45.jdk/Contents/Home/bin/javac "-J-Xmx256M" "-encoding" "utf8" ....
[ERROR] :  Failed to compile Java source files:
[ERROR] :  
[ERROR] :  /Users/ahmed/Documents/Appcelerator_Studio_Workspace/testingnew/build/android/gen/testingnew/spica/ae/AssetCryptImpl.java:44: error: cannot find symbol
[ERROR] :       Range range = assets.get(path);
[ERROR] :                     ^
[ERROR] :    symbol:   variable assets
[ERROR] :    location: class AssetCryptImpl
[ERROR] :  /Users/ahmed/Documents/Appcelerator_Studio_Workspace/testingnew/build/android/gen/testingnew/spica/ae/AssetCryptImpl.java:48: error: cannot find symbol
[ERROR] :       return new String(filterDataInRange(assetsBytes, range.offset, range.length));
[ERROR] :                                           ^
[ERROR] :    symbol:   variable assetsBytes
[ERROR] :    location: class AssetCryptImpl
[ERROR] :  Note: /Users/ahmed/Documents/Appcelerator_Studio_Workspace/testingnew/build/android/gen/testingnew/spica/ae/AssetCryptImpl.java uses unchecked or unsafe operations.
[ERROR] :  Note: Recompile with -Xlint:unchecked for details.
[ERROR] :  2 errors
titanium exited with exit code 1
[ERROR] Application Installer abnormal process termination. Process exit value was 1