I create multiple Excel files using data from a single database in which the
data is updated daily. I use the "import external data" function to populate
the Excel files and, in most cases, it works perfectly. However, I have 3
worksheets in which the "data refresh" icon grays out after 2 uses.

As background, my daily reporting includes 4 files, each of which is a
subset of my main data table. Each file is based on a select query which
filters data for a specific workgroup (S1, S2, S3, S4). The first file, S1,
works perfectly -- the data refresh icon is active every time. The other 3
files can only be refreshed twice. After that, I have to go back to the menu,
import external data, select the query from the list in the popup box that
appears, and click OK.

As added background, I have had several occasions to completely re-do these
data links. There have been several times when new columns have been added to
the data table, requiring me to replace the query. But every single time, the
original situation recurs -- the S1 file will maintain the link, and the
others will not. I'm completely puzzled, have never seen a similar question
here, and would welcome any enlightenment.