I searched the StackExchange forum for an answer too my question and apologize if I missed it.
I'm using QGIS 2.2 64-bit and able to read feature classes from an ESRI file geodatabase without a problem. The problem occurs when I attempt to save a layer to a file geodatabase by right-clicking on the layer and selecting "Save As." I have "ESRI FileGDB" selected as the desired format and enter a name for the exported feature class. The result is a file geodatabase created with the name of the feature class and an error message
Export to vector file failed.
Error: creation of layer failed (OGR error:Error: Failed at creating FeatureDataset (General function failure.))
Any idea why the feature class export to a file geodatabase fails?