ARDL model error

Hi,

I have previously run stationarity tests to ensure the data i have is acceptable for the ARDL model fulfils both I(1) and then I(0) in first difference under the Augmented Dickey Fuller test. However when i run the command

“ardl depvar indepvar1 indepvar2 … , aic”
I get the error term:
likelihood information not found in last estimation results
stata(): 3598 Stata returned error
_ardl_optimlag(): - functioned returned error
​ _<istmtt>: - functioned returned error

​With the error code message saying "You are using a Stata interface function and have asked Stata to perform a task. Stata could not or refused."

Is there a solution to this? Any help would be greatly appreciated.