Cannot enter train

[Bolisaris]

Hi starting today I cannot enter my train by using the 'Enter' key, I have checked the settings and it shows as 'Enter' so I changed it for something else (I used the 'Enter' key on the numpad), this did not help so I checked my keyboard using 'Word' and all keys operate correctly.

Is this a known issue and is ther a fix, please help.

[FuryoftheStars]

Are you using any mods?
Can you enter other trains and/or cars?
If you remove and then re-place this train, does that fix it?