Outreg2 gives error: __000001_wvar not found

Hi,

I am using Stata 14 and I have installed outreg2. Sometimes this command displays the results and other times it does not. I have estimated several equations and stored them using the command as follows:

est store eq8

In order to display the results I use outreg2 as follows:

. outreg2 [eq8] using table,replace

It gives me an error:

__000001_wvar not found
r(111);


How can this error be fixed? Is there any other alternative command that can be used to display the results?

Regards,

Maliha Nazir