importing into different stores

[Penina]

I have products that need to be imported into different stores

sku, name, store1, store2, subcat
111, item1, coke, pepsi, subcategory

i wrote out some logic that works for the value replacer plugin:
[{item.store1}]/{item.subcat};;[{item.store2}]/{item.subcat}

the problem is, what if i have some items that only have a value under store1 and are blank for store2 or the opposite?

I get an error when importing that says Cannot find site root with names : ,

Is there a way to work around this?

[Penina]

Issue was resolved here:
http://stackoverflow.com/questions/22713230/magento-importing-into-different-stores-using-magmi