Deck Railing not connected to wall?

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I have a plan with a deck.  I used deck railings which formed a room and my deck appears.  But by moving on of the railings slightly the deck room (and deck) dissappears.

 

Very frustrating for a new user like me so I am hoping someone here can clue me in.

 

Below the deck looks good.

 

But if I move the railing one foot in the upper left the whole room becomes undefined.

 

[solver 644]

Close Pro, attach the plan file and I'll have a look.

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Thanks for agreeing to take a look at this.

 

I compressed and attached it.

PSB Design #2.zip

[solver 644]

This is almost always a problem with one or more walls marked No Room Definition.

 

Notice there is no room definition in the space to the right of the hi-lighted wall.

 

The program has a rather annoying habit of auto generating walls and marking them No Room Def. 

 

See the selected wall in the image. You also have some wall alignment issues -- the top one is obvious, the lower one the walls do not align vertically.

 

[bixelps 0]

Eric,

 

Thanks so much for this help.  I have learned that wall alignment is critical to establishing a room.

 

-Paul