.ai image in illustrator cc 2015

Some days ago I worked in Adobe Illustrator. I made some objects in file. Today I opened this file and saw - Can’t open the illustration. The illustration contains an illegal operand. I have never seen nothing like this before. Does anyone know any illustrator recovery methods?

Place damage illustrator file to new .ai file, if it doesn’t work, another and select the damaged Illustrator file and then click “Place” it must help you. Moreover you may apply Recovery Toolbox for Illustrator.

• Double-click the Adobe Illustrator icon on your desktop to open the program. Click the File drop-down and select the “New” option.
• Choose the size and color mode for the file and then click the “OK” button.
• Click the File drop-down and then select the “Place” option. Choose the “All Formats” from the Files of Type menu when the Place dialog box appears.
• Select the damaged Illustrator file and then click “Place.” Enter a new name for the file and then click “Save.” This will create a new Illustrator file with information from the damaged file.