Cooper Sloan commented on MADLIB-1091:

Can you give the database version and madlib version please?

> Linear regression fails in merge for groups with small number of rows
> ---------------------------------------------------------------------
>                 Key: MADLIB-1091
>                 URL: https://issues.apache.org/jira/browse/MADLIB-1091
>             Project: Apache MADlib
>          Issue Type: Bug
>          Components: Module: Linear Regression
>            Reporter: Rahul Iyer
>             Fix For: v1.12
> Issue reported by user: 
> {quote}
> Hi all! I'm trying to run madlib's linear regression on a table with a group 
> by column for a client engagement. There are 44.5M distinct values in the 
> group by column and 14 data points for each group by value. Each regression 
> should be very simple since its only 14 points but I'm getting an error:
> {code}
> Function "madlib.linregr_merge_states(madlib.bytea8,madlib.bytea8) is 
> improperly aligned for alignment request in seek()"
> {code}
> Tested it on a few rows and it worked. Any idea what might be causing this 
> error or what this error means? 
> {quote}

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