Now, would someone like a child or catacum (studying for baptism in the case of an adult convert) be saved with out it? Yes.
In the case of someone who refuses to receive or is excluded from communion (excommunicated).. Well it isn't as cut and dried. The problem isn't so much the act of receiving the Lord's Supper, as it is not doing a direct command of Christ. And if you have be screwing up so badly that the Church kicks you out for justifiable reasons, then maybe you need to take a close look at own soul.
So in strict terms, you can be saved if you don't partake of the Lord's Supper, but why wouldn't you want to?
And yet you guys talk about the unity in your religion...You guys are all over the place when it comes to dogma and rules and doctrine...