Hi Epidata members,

I am trying to figure out how the relate function works in Epidata. I am following the examples on the epidata website. I downloaded this zip file today: Relate example - Clinical Study with four forms Working example of the structure for a Clinical study with a start, then by relating on id entering data into basic person information, sideeffects, status information and pre-study level.

This example is giving me all kinds of errors. First, I thought that it was because the Start.Rec and Clinical Study.rec are the same. I excluded all the files starting with start.*. This wasn't the case, I narrowed it down to the file controlvisit.rec. The error received is : The field id is KEY UNIQUE, but duplicate keys were found in records 1 and 2.

A second error pops up directly after the first one: Access violation at address 004138D3 in module 'EpiData.exe' Read of address 00000000.

I am looking forward to learn more on how to solve this issue.

Happy Holidays!

Renate

Renate van Dorp, MSc, PhD Epidemiologist Perth District Health Unit 653 West Gore Street Stratford, ON N5A 1L4 Tel: 519-271-7600 ext 246 Fax: 519-271-2195 Email: rvandorp@pdhu.on.ca mailto:rvandorp@pdhu.on.ca

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