The selected data source is read-only

Anyone know how to fix this "issue"
The selected data source is read-only. You cannot change the view configuration.
Thanks in Advance.

Assuming that it's not actually read-only (because you're trying to hit a follower node or a data source that is currently loading non transactionally, etc.), you should be able to just click the Data Source edit button and click Save to "wake it up".
In previous versions of the product there was a "Refresh Data Sources" that would do the trick but I haven't seen it in the 3.0 version of Studio.
If enough people need it, maybe we'll just write it or something.
Patrick Rafferty
http://branchbird.com/

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hey guys..
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Details
Product:
sql server reporting services
ID:
rsreadonlyreportparameter
Source:
microsoft.reportingservices.diagnostics.utilities.errorstrings.resources.strings
Version:
8.00
Message:
The report parameter '{0}' is read-only and cannot be modified.
Explanation
This error occurs when you attempt to set a value for a parameter that is read-only. A parameter is read-only when the
Prompt property for the parameter is set to false.
User Action
To set a value for a parameter, the Prompt property for the parameter must be set to
true. You can set this property in two ways:
Before publishing the report, provide a prompt string for the parameter. In Report Designer, you can provide a prompt by typing a prompt string in the
Prompt text box in the Report Parameters dialog box.
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Parameters tab, and then select Prompt User for the parameter.
For more information about report parameters in Report Designer and Report Manager, see Books Online.
In the release version of SQL Server 2000 Reporting Services, when Prompt is
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Note: Publishing a report over an existing report on the report server does not overwrite the parameter information. To update parameters for an existing report, either delete the report on the report server and republish, or update the parameter information
for the report in Report Manager.
I struggled with the same problem in VS 2010.
After a long series of hoops to jump through, I modified the rdlc file by hand and added <Prompt>true</prompt>. This parameter cannot be set through the GUI - go figure.
In my case, I was attempting to generate a sub report, and pass a parameter to the sub report.
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<ReportParameters>
<ReportParameter Name="Network_Id">
<DataType>String</DataType>
<Prompt>true</Prompt>
</ReportParameter>
</ReportParameters>
<Variables>
<Variable Name="Network_ID">
<Value />
</Variable>
</Variables>
I was then able to use the name "Network_Id" in the sub-report properties of the "sub report control" for the name of a parameter on the parameters tab. I then set it to the key value that I need in the subreport properties dialog.
Prior to setting prompt to true, I kept getting the read-only exception.
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876149 wrote:
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declare
v_query varchar2(200),
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go_block('emp');
set_block_property('emp',query_data_source_name,v_query);
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Message was edited by:
Punithavel

Thanks for your response
We fixed the error
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Excel SSAS Tabular error: An error occurred during an attempt to establish a connection to the external data source

Hello there,
I have an Excel report I created which works perfectly fine on my dev environment, but fails on my test environment when I try to do a data refresh.
The key difference between both dev and test environments is that in dev, everything is installed in one server:
SharePoint 2013
SQL 2012: Database Instance, SSAS Instance, SSRS for SharePoint, SSAS POWERPIVOT instance (Powerpivot for SharePoint).
In my test and production environments, the architecture is different:
SQL DB Servers in High Availability (irrelevant for this report since it is connecting to the tabular model, just FYI)
SQL SSAS Tabular server (contains a tabular model that processes data from the SQL DBs).
2x SharePoint Application Servers (we installed both SSRS and PowerPivot for SharePoint on these servers)
2x SharePoint FrontEnd Servers (contain the SSRS and PowerPivot add-ins).
Now in dev, test and production, I can run PowerPivot reports that have been created in SharePoint without any issues. Those reports can access the SSAS Tabular model without any issues, and perform data refresh and OLAP functions (slicing, dicing, etc).
The problem is with Excel reports (i.e. .xlsx files) uploaded to SharePoint. While I can open them, I am having a hard time performing a data refresh. The error I get is:
"An error occurred during an attempt to establish a connection to the external data source [...]"
I ran SQL Profiler on my SSAS Server where the Tabular instance is and I noticed that every time I try to perform a data refresh, I get the following entries:
Every time I try to perform a data refresh, two entries under the user name ANONYMOUS LOGON.
Since things work without any issues on my single-server dev environment, I tried running SQL Server Profiler there as well to see what I get.
As you can see from the above, in the dev environment the query runs without any issues and the user name logged is in fact my username from the dev environment domain. I also have a separated user for the test domain, and another for the production domain.
Now upon some preliminary investigation I believe this has something to do with the data connection settings in Excel and the usage (or no usage) of secure store. This is what I can vouch for so far:
Library containing reports is configured as trusted in SharePoint Central Admin.
Library containing data connections is configured as trusted in SharePoint Central Admin.
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P.

Hi Rameshwar,
PowerPivot workbooks contain embedded data connections. To support workbook interaction through slicers and filters, Excel Services must be configured to allow external data access through embedded connection information. External data access is required
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Click Excel Services Application.
Click Trusted File Location.
Click http:// or the location you want to configure.
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Click OK.
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Create a trusted location for PowerPivot sites in Central Administration:
http://msdn.microsoft.com/en-us/library/ee637428.aspx
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http://technet.microsoft.com/en-us/library/ff487858(v=sql.110).aspx
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Troubleshooting PowerPivot Data Refresh:
http://social.technet.microsoft.com/wiki/contents/articles/3870.troubleshooting-powerpivot-data-refresh.aspx
Hope this helps.
Elvis Long
TechNet Community Support

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... 15 more
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Madeline wrote:
how do I ask at Apache mailing list?I wonder why it seems to be a strange idea to some people to look at the software vendor's site for product support. :p
http://poi.apache.org/mailinglists.html

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Hi,
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