yet another "failed to save modifications to the server" problem

[scotjn1]

There are tons of threads with the "failed to save modifications to the server" error, but they are quite varied and none fit my situation.  Seems like this might be a generic error message.

Use case:  I'm trying to create a central “key table” in my data model based on distinct clientID & assetID combinations.  The “key” data is gathered from various tables in two databases: one is Sybase and one is "FiloDB" (it's called a lot of things at my company, and it's fairly new to us so I'm not sure; maybe it's "Simba Spark", as the ODBC driver is called "Simba Spark ODBC Driver").

I can successfully query data from both sources, so in my data model I have a table of distinct values from Sybase and a table of distinct values from FiloDB.

The error arises when I try to append the two separate tables within Power BI.  It works correctly if there are only a couple hundred records in each, but it fails when the datasets are only slightly larger: approx. 30K rows each.  (I will need this to scale up significantly, but...baby steps.)

I’ve tested different appends to ensure that they work, and I have tested appending the FiloDB table to various data sources (wherever possible, the other source is just the Sybase data extracted so it's the same data).  The error occurs only when appending to the data queried directly from Sybase.  Test cases:

• Sybase + Sybase = success
• FiloDB + FiloDB = success
• FiloDB + .csv = success
• FiloDB + local Access database = success
• FiloDB + local SQL Server instance = success
• FiloDB + Sybase = FAIL

I have already tried some of the suggestions in other threads for this "failed to save" error on the off chance they might have worked.

I am stumped.  Please help!

Thanks,

Jacob

[v-yuezhe-msft · Accepted solution]

@scotjn1,

How about you use UNOIN() function instead of "append queries" to append FiloDB table to Sybase?

You can check my reply about how to use UNION function in the similar thread below.
http://community.powerbi.com/t5/Desktop/External-Mapping-for-data-mashup/m-p/270311

Regards,
Lydia

[scotjn1]

This worked, thank you!!

I wasn't sure it would at first because the key table is in the middle of a huge spiderweb, but I was able to swap in the DAX-UNIONed table as the key!