The entered fiscal year & is in a closed time period.

What causes this issue?

In order to carry out the depreciation posting, you have entered the
fiscal year &V1&.
This fiscal year is already closed. You can only carry out a
depreciation posting run in an open fiscal year.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check your input.
If it is nonetheless necessary to carry out a depreciation posting in a
closed fiscal year, you must first re-open fiscal year &V1& using the
relevant Customizing setting.
<ZH>Caution:</>
When you re-open a closed fiscal year, <ZH>all</> functions in this
fiscal year are available again (recalculation of depreciation,
postings, and so on). You have to organize which activities you want to
allow in the fiscal year.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.