Export from GPK to GDF File

Question

I am trying to Export from a GPK file to a GDF File and the Nodes will export, however the Links will not. I have another project available to reference and I can successfully export both the Nodes and Links in the other file. Any help to figure out why the Links will not export is much appreciated. 
 Thanks

Beebe Ray · Answer

Can you check some things, there are a lot of requirements for this to work properly. 
 
Requirements: 
 
	Survey chains consisting of exactly two points. The SIZE and CONDITION of the pipe must be collected as attributes to the pipe 
	The attributes are setup in the SMD file as Parameters for each feature that is a pipe 
 
All pipe features MUST have SIZE and CONDITION parameters. These parameters must be collected with each pipe located in the field and/or can be edited in the office. 
 
Is the Data Dictionary properly set for the dataset that does not work?... Feature Codes have to be unique for each type of pipe (RCP, PVC). For instance for a "reinforce concrete Pipe" you must have a code like RCP , and the size (which come from the attribute and/or comments) will be matched in the Drainage dictionary.