Voir :https://support.hpe.com/hpesc/public/docDisplay?docId=sf000057375en_us&docLocale=en_US

Resolution Please use below screenshots/steps to upgrade firmware of Procurve (or any other) switches using IMC.

Login to iMC https://imc.local.enit.fr:8443/, go to Service -> Configuration Center -> Software Library
Check if required firmware file is available in library. If not, use "Add" button to load firmware file in IMC. If available, select the file and click on "Deploy"
Click on "Select device", browse using type or IP address. Select appropriate device.
Device will be visible under the list. Use appropriate one or more device types.
Click next, it checks and shows if sufficient space is available in memory.
Under "Set task attributes", give any name or it will take automatic one. Schedule time or select "Immediately".
Verify summary of the task and click **"Finish"**
Select task and click "Execute" if required
Once the task is executed successfully, check firmware on device.