SPSS Statistics

It means that in either or both of the files you are merging, the School_Code value "2" appears in more than 1 row of the dataset. Each row has to have a unique value for that variable, or the MATCH you specified won't know what to do.

Original Message:
Sent: Mon February 20, 2023 04:50 PM
From: Megan Smith
Subject: Merge Error Message

I'm merging pre and post data for a chi-square analyses merging on the key variable "school_code" which is numeric and I'm getting this message, but I don't understand what it means. 

here is a script for removing duplicates.  there is also a point and click & aggregate way to do this.

sort cases by school_code.

if school_code=lag(school_code) drop=1.

select if missing(drop).

Original Message:
Sent: Mon February 20, 2023 04:50 PM
From: Megan Smith
Subject: Merge Error Message

I'm merging pre and post data for a chi-square analyses merging on the key variable "school_code" which is numeric and I'm getting this message, but I don't understand what it means.