Solution : https://service.sap.com/sap/support/notes/1133524 (SAP Service marketplace login required)
Key words : 
sapgui solution import sap gui, system previously created, symptom creating screenshots, sapgui commands, ecatt script, bmp format, screenshots require, terms ecatt, windows 710 patch 07, screenshots
Related Notes : 
       
| 1393245 | eCATT SAPGUI screenshots: Problem with transaction with '/' | 
| 509992 | Composite SAP Note: eCATT recorder | 
| 96885 | Downloading front end patches |