There are a few reasons why your switch may fail. Check here:
Your mutual fund units are in a Demat account. Funds in a Demat account cannot be switched.
Your investment amount is less than the minimum amount required to make a new investment in the direct fund.
If your funds are in the lock-in period, you won’t be able to switch your funds.
You can try searching for your issue. Alternatively, you can raise a ticket with us. Our Customer Support executives will be happy to assist you.