Update how-to-execute.md

Author: estevao-schultz-neto-SAP

pages/how-to-execute.md

@@ -28,6 +28,9 @@ In the tab `Options`, you have to inform your global check variant:
 
 ![sap gui atc execution](imgs/sap-gui-atc.png)
 
+#REMARK: In order to be able to execute the checks directly via ATC, a User-Parameter has to be set as follows: Go to Menu: SYSTEM --> User Profile --> User Data --> then in the tab `Parameters`, make sure this entry is set: `SATC_CI_MODE = X`.  
+![image](https://user-images.githubusercontent.com/63100656/113266529-acd10180-92d5-11eb-80d9-c2717f0be1ca.png)
+
 
 ### Executing via Eclipse (ADT)