Info on Train from Paris to Versailles

Don't know current situation but we are in Paris every year and for the last few years the RER C has pretty much ALWAYS been down in central Paris for much of our time there. When we went to Versailles last year we took the metro to Champ du Mars which was then open for the C to Versailles; we have friends who boarded at Javel. This is no big deal -- just figure out the route to get to Javel from where you are.

Has anyone taken the metro to Javel and then the RER C to Versailles?
Yes. Assuming you are asking for information on how to do it as opposed to taking a poll, you just buy a ticket to Versailles. Then you take the metro to Javel station. I do not know where you are coming from but Javel is a stop on Line 10. Upon exiting the metro, you walk towards the river to the Javel RER station and use the same ticket to connect to the RER C. I did it with a 4-year-old, a 12-year-old, and a 14-year-old in tow and it was easy. The walk between the two Javel station took us about 8 minutes mainly because of the 4-year-old.

You just have to cross a street exiting the metro at Javel. Keep your ticket if you have one (and not a pass), as it's valid for both metro and RER if you buy a ticket to Versailles Chateau at your starting point (and you can buy the return too, as tickets can be used in any direction: a Paris-Versailles ticket is good for Versailles-Paris).

Thank you for your information. I found that the 4 train is shut down on evenings and weekends (thru 2020) as it is being converted to an automated line...therefore can't take get the RER C on the weekend from St Michel...must go to Invalidies and take the metro to Javel, then change to the RER C to Versailles. Special thanks for the heads up that in Javel the metro and the RER C stations are not connected and require exit and re-entry.
thank you all for your responses...much appreciated!!

FYI...Further research confirms that train #4 will not connect with RER C on weekends due to train construction work throughout 2020. So if you going from center city Paris to Versailles on the weekend it looks like the most direct train route is to leave on the RER C from Invalides directly to Chateau Versailles/Rive Gauche. There is no transfer at Javel if this route is taken. Most other routes from downtown Paris require a change in Javel/Andre/Citroen.

Almost all metro/RER exchanges are underground at one station; Javel is one of the few where you have to exit and re-enter at a different point-- the ticket will understand this. (you do always have to use the ticket to enter the RER from the metro even at underground change points and you do need the ticket to exit the RER -- not the metro -- as RER tickets are metered and you need a ticket to the precise exit destination outside Paris.