The phrase "any indication when" is correct and usable in written English.
It can be used when inquiring about the timing or schedule of an event or action.
Example: "Do you have any indication when the project will be completed?"
Alternatives: "any idea when" or "any word on when".
Any indication when facilities might get electrical power?
But he didn't give a date or any indication when the pause would be lifted.
He did not give any indication when he received it of what he intended to do, a Labour official said.
There is a way to go before then and there isn't any indication when a single judge might look at the application".
He said that although the company's shipping costs were not a cause for alarm, he was concerned that its spending on new hiring and on technology continued to rise without any indication when it might end.
If his past shows are any indication, when he takes the stage at Caroline's during the final weekend of the New York Comedy Festival, his best bits will be self-deprecating ones in which names are dropped liberally.
Beyond just the ticket holders, a lot of people (Kanye refuses to release hard stats on how many) paid $20 to download the album via TIDAL, only to have that download cancelled and be told, similarly, that TLOP is unfinished and they'll receive a copy when it is without any indication of when that will be.
But only one of the six, David Hicks, an Australian, has been assigned a lawyer, and there is no indication when any proceedings will begin.
Mr. Browne gave no details about Ms. Ortega's condition nor any indication of when she would leave the hospital.
Currently, it leads you straight in the direction of your destination and doesn't give you any indication of when you've arrived.
