Error occured in call to Open

Error Desc: Syntax error (missing operator) in query expression 'article_key='.
Error Number: -2147217900
Error Source: Microsoft JET Database Engine

VarName: strQry
Var Value:select article.articletype_fkey , article.articleCategory_fkey, articlecategory.* , page.url from (article inner join articlecategory on articlecategory.articleCategory_key= article.articleCategory_fkey ) inner join page on page.page_key=articleCategory.page_fkey where article_key=

VarName: iCursor
Var Value:0

VarName: iLock
Var Value:1

VarName: vOptions
Var Value:0