https://community.checkpoint.com/t5/Spark-Firewall-SMB/R81-10-17-Upgrade-Policy-Installation-Failed-Error-00351/m-p/271660#M13692 <P>Dear Check Point Support Team,</P><P>We would like to request your assistance regarding an issue after OS upgrade.</P><H3>1. Upgrade Information</H3><P>We have upgraded the Security Gateway OS from:</P><UL><LI><P>Version: R81.10.08</P></LI><LI><P>To Version: R81.10.17 (Build R81.10.17_996004721)</P></LI></UL><P>The upgrade process was completed successfully without any interruption or error during installation.</P><HR /><H3>2. Issue Description</H3><P>After the upgrade, we are unable to install policies successfully.</P><P>The following issues are observed:</P><UL><LI><P>VPN policy cannot be installed</P></LI><LI><P>NAT policy cannot be applied</P></LI><LI><P>IPS policy cannot be applied</P></LI><LI><P>Some Security Settings policy changes could not be applied</P></LI><LI><P>Error message appears during policy installation</P></LI></UL><P>System Notification shows:</P><BLOCKQUOTE><P>Error has occurred while applying the Firewall settings (error 00351).<BR />If the problem persists, contact Check Point Technical Assistance Center.</P></BLOCKQUOTE><P>From SmartConsole logs:</P><UL><LI><P>“VPN policy change could not be applied”</P></LI><LI><P>“IPS policy change could not be applied”</P></LI><LI><P>“NAT policy change could not be applied”</P></LI><LI><P>“A policy change could not be applied”</P></LI></UL><P>High Availability policy shows as applied successfully, but other policies are failing.</P><P>I just tried to restore the previous version, but there is still an error.&nbsp;</P><P>May you give any advice about this case?</P> Mon, 23 Feb 2026 10:14:36 GMT Phuc138878 2026-02-23T10:14:36Z https://community.checkpoint.com/t5/Spark-Firewall-SMB/R81-10-17-Upgrade-Policy-Installation-Failed-Error-00351/m-p/271660#M13692 <P>Dear Check Point Support Team,</P><P>We would like to request your assistance regarding an issue after OS upgrade.</P><H3>1. Upgrade Information</H3><P>We have upgraded the Security Gateway OS from:</P><UL><LI><P>Version: R81.10.08</P></LI><LI><P>To Version: R81.10.17 (Build R81.10.17_996004721)</P></LI></UL><P>The upgrade process was completed successfully without any interruption or error during installation.</P><HR /><H3>2. Issue Description</H3><P>After the upgrade, we are unable to install policies successfully.</P><P>The following issues are observed:</P><UL><LI><P>VPN policy cannot be installed</P></LI><LI><P>NAT policy cannot be applied</P></LI><LI><P>IPS policy cannot be applied</P></LI><LI><P>Some Security Settings policy changes could not be applied</P></LI><LI><P>Error message appears during policy installation</P></LI></UL><P>System Notification shows:</P><BLOCKQUOTE><P>Error has occurred while applying the Firewall settings (error 00351).<BR />If the problem persists, contact Check Point Technical Assistance Center.</P></BLOCKQUOTE><P>From SmartConsole logs:</P><UL><LI><P>“VPN policy change could not be applied”</P></LI><LI><P>“IPS policy change could not be applied”</P></LI><LI><P>“NAT policy change could not be applied”</P></LI><LI><P>“A policy change could not be applied”</P></LI></UL><P>High Availability policy shows as applied successfully, but other policies are failing.</P><P>I just tried to restore the previous version, but there is still an error.&nbsp;</P><P>May you give any advice about this case?</P> Mon, 23 Feb 2026 10:14:36 GMT https://community.checkpoint.com/t5/Spark-Firewall-SMB/R81-10-17-Upgrade-Policy-Installation-Failed-Error-00351/m-p/271660#M13692 Phuc138878 2026-02-23T10:14:36Z https://community.checkpoint.com/t5/Spark-Firewall-SMB/R81-10-17-Upgrade-Policy-Installation-Failed-Error-00351/m-p/271669#M13693 <P>Please look into&nbsp;<A href="https://support.checkpoint.com/results/sk/sk100610" target="_blank">https://support.checkpoint.com/results/sk/sk100610</A>&nbsp;and follow the troubleshooting steps for your version. If required, open a TAC call: <A href="https://help.checkpoint.com" target="_blank">https://help.checkpoint.com</A></P> Mon, 23 Feb 2026 10:51:22 GMT https://community.checkpoint.com/t5/Spark-Firewall-SMB/R81-10-17-Upgrade-Policy-Installation-Failed-Error-00351/m-p/271669#M13693 _Val_ 2026-02-23T10:51:22Z https://community.checkpoint.com/t5/Spark-Firewall-SMB/R81-10-17-Upgrade-Policy-Installation-Failed-Error-00351/m-p/271895#M13704 <P>Thank you for the reference.</P><P>I have opened a TAC case with Check Point and worked with them on the issue. The root cause was identified as a custom URL object with no category configured.</P> Wed, 25 Feb 2026 03:41:55 GMT https://community.checkpoint.com/t5/Spark-Firewall-SMB/R81-10-17-Upgrade-Policy-Installation-Failed-Error-00351/m-p/271895#M13704 Phuc138878 2026-02-25T03:41:55Z