Hi,
Been getting inconsistent errors when using the Move File connector. One day it works and another day it doesn't. The same workflow with the 'Move file' connector worked 6 days ago and now it has failed again.
Recent error - no changes were made to the workflow (just did a rerun)

Successful 6 days ago

Error received
Object reference not set to an instance of an object. CallStack -- at Microsoft.SharePoint.Deployment.ListItemVersionSerializer.AddListItemVersion(SPWeb web, SPListItem listItem, SPLoggerObject loggerObject, Guid newId, Boolean editHistory, Boolean existsInDb, Boolean isFirst, Boolean isLast, Boolean isDocLib, StreamingContext context, XmlElement listItemData, SerializationInfoHelper listItemInfoHelper, SPResourcePath& listItemServerRelativeUrl, ISurrogateSelector selector, LoggerStatistics stats, Guid docId)
at Microsoft.SharePoint.Deployment.ListItemSerializer.UpdateListItemVersionData(SerializationInfoHelper infoHelper, SPWeb web, SPListItem& listItem, Guid newId, Boolean existsInDb, Boolean isDocLib, SPResourcePath& listItemServerRelativePath, StreamingContext context, ISurrogateSelector selector)
at Microsoft.SharePoint.Deployment.ListItemSerializer.SetObjectData(Object obj, SerializationInfo info, StreamingContext context, ISurrogateSelector selector)
at Microsoft.SharePoint.Deployment.XmlFormatter.CallSetObjectData(Object obj, SerializationInfo objectData, ISerializationSurrogate surrogate, ISurrogateSelector selector)
Actual Workflow

Not sure what is going on here. haven't had good experiences using the 'Move File' connector. Can somebody point me to the right direction please? Thanks.