I am working on SharePoint App for office Store. i have published an app in office
store. For new installation, it is working fine without any problem. i have
several instances of installation through catalog. For updating, with
improvement, sometimes gives problems. Same version can update some instances
and some are not. It gives an error and then failed to update the site. In most
cases, I got the following errors in the Upgrade Errors window:<o:p></o:p>
"There was a problem accessing the file system on the server. Details: Cannot complete
this action. Please try again." <o:p></o:p>
How can I allow accessing the file system on the server? <o:p></o:p>
Can anyone in this forum have any suggestion how to get rid of this error? We tried several times to
update by crossing fingers, but no luck. Please note that the same version can
update the other apps instances. Getting this error, we are reluctant to update
our customer sites. It would be a great help!