Error when Save and Close dataflow

[RobertSlattery]

After editing a dataflow, I get an error when I try to "Save and Close".

My scenario is when I edit a query that has been set for incrimental refresh.  I edit it to pass the range params to a custom function that folds them into the sql for an odbc query.

let
    //Source = ODBC_BLP800CFBL(SalesOrdersSQL,pFrom, pTo)
    Source = ODBC_BLP800CFBL(SalesOrdersSQL,RangeStart, RangeEnd),
    #"Changed column type" = Table.TransformColumnTypes(Source, {{"DATE", type datetime}}),
    #"SalesOrders-44415445-autogenerated_for_incremental_refresh" = Table.SelectRows(#"Changed column type", each DateTime.From([DATE]) >= RangeStart and DateTime.From([DATE]) < RangeEnd)
in
    #"SalesOrders-44415445-autogenerated_for_incremental_refresh"

I uncomment the second line and comment the first, then Save and Close and get the following error...

Activity ID: 7f4edb29-fbd8-4c2e-83ab-de923fa74508
Request ID: 3f908d78-94dd-1cc9-0d9e-ea5236e9ab98
Correlation ID: 187f3269-3617-a28f-0c45-04a443cfcb66
Status code: 500
Time: Tue Apr 26 2022 12:32:50 GMT+1000 (Australian Eastern Standard Time)
Service version: 13.0.18082.40
Client version: 2204.2.10821-train
Cluster URI: https://wabi-australia-southeast-redirect.analysis.windows.net/

In the past I have successfully used this technique but, now I get the error, even if I re-create the dataflow from scratch and/or in another workspace.

[v-zhangti]

Hi, @RobertSlattery 

Please refer to the following post, hope it can help you.

https://community.powerbi.com/t5/Power-Query/DataFlow-does-not-save-due-to-dynamic-data-source/m-p/2... 

https://community.powerbi.com/t5/Service/Can-t-save-dataflow-cannot-acquire-lock-for-model/m-p/81857... 

https://community.powerbi.com/t5/Service/Cannot-refresh-or-save-dataflow-Cannot-acquire-lock-for-mod... 

https://community.powerbi.com/t5/Service/Can-t-save-dataflow-Unknown-exception/m-p/2033530 

Best Regards,

Community Support Team _Charlotte

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[RobertSlattery · Accepted solution]

Thanks for the suggestions, unfortunately they didn't help.  I managed to solve the problem mysef by changing the proceedure I followed.  After I uncomment the line

Source = ODBC_BLP800CFBL(SalesOrdersSQL,RangeStart, RangeEnd),

 I also delete 

#"SalesOrders-44415445-autogenerated_for_incremental_refresh" = ...

 I then save the dataflow and this last line is re-inserted automatically.