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Process : Upgrade magentoMagento version from 2.2 to 2.3

As per my client requirement, I was tried to upgrade Magento from 2.2 to 2.3 as per mention intomentioned in this siteURL: https://devdocs.magento.com/guides/v2.3/comp-mgr/cli/cli-upgrade.html

All steps were run properly but after run "composer update"composer update command it will throw following Fatal error after some time as per mention into the screenshot  .

enter image description here

And then after exit from "composer update"composer update command.

Please suggest me how can I fix this error ?.

Thanks in advance.

Process : Upgrade magento version from 2.2 to 2.3

As per my client requirement, I was tried to upgrade Magento from 2.2 to 2.3 as per mention into this site: https://devdocs.magento.com/guides/v2.3/comp-mgr/cli/cli-upgrade.html

All steps were run properly but after run "composer update" command it will throw following Fatal error after some time as per mention into the screenshot  .

enter image description here

And then after exit from "composer update" command.

Please suggest me how can I fix this error ?.

Thanks in advance.

Process : Upgrade Magento version from 2.2 to 2.3

As per my client requirement, I tried to upgrade Magento from 2.2 to 2.3 as mentioned in this URL: https://devdocs.magento.com/guides/v2.3/comp-mgr/cli/cli-upgrade.html

All steps were run properly but after run composer update command it will throw following Fatal error after some time as per mention into the screenshot.

enter image description here

And then after exit from composer update command.

Please suggest me how can I fix this error ?.

Thanks in advance.

2 edited body
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Process : Upgrade magento version from 2.2 to 2.3

As per my client requirement, iI was tried to upgrade magentoMagento from 2.2 to 2.3 as per mention into this site  : https://devdocs.magento.com/guides/v2.3/comp-mgr/cli/cli-upgrade.html

All steps were ranrun properly but after run "composer update" command it will throw following Fatal error after sometimesome time as per mention into the screenshot .

enter image description here

And thenthen after exit from "composer update""composer update" command.

Please suggest me how can iI fix this error ?.

Thanks in advance.

Process : Upgrade magento version from 2.2 to 2.3

As per my client requirement, i was tried to upgrade magento from 2.2 to 2.3 as per mention into this site  : https://devdocs.magento.com/guides/v2.3/comp-mgr/cli/cli-upgrade.html

All steps were ran properly but after run "composer update" command it will throw following Fatal error after sometime as per mention into screenshot .

enter image description here

And then after exit from "composer update" command.

Please suggest me how can i fix this error ?.

Thanks in advance.

Process : Upgrade magento version from 2.2 to 2.3

As per my client requirement, I was tried to upgrade Magento from 2.2 to 2.3 as per mention into this site: https://devdocs.magento.com/guides/v2.3/comp-mgr/cli/cli-upgrade.html

All steps were run properly but after run "composer update" command it will throw following Fatal error after some time as per mention into the screenshot .

enter image description here

And then after exit from "composer update" command.

Please suggest me how can I fix this error ?.

Thanks in advance.

1
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how to fix error occurred during upgrade magento from 2.2 to 2.3?

Process : Upgrade magento version from 2.2 to 2.3

As per my client requirement, i was tried to upgrade magento from 2.2 to 2.3 as per mention into this site : https://devdocs.magento.com/guides/v2.3/comp-mgr/cli/cli-upgrade.html

All steps were ran properly but after run "composer update" command it will throw following Fatal error after sometime as per mention into screenshot .

enter image description here

And then after exit from "composer update" command.

Please suggest me how can i fix this error ?.

Thanks in advance.