SSAS Tabular - Adding Column to a table gives error "Object reference not set to instance of object"

If I make changes to a table in SSAS Tabular Visual Studio, the newly added column gives error as "Object
reference not set to instance of object"

Hi VikasJain13,
According to your description, you get the "Object reference not set to instance of object" error when adding columns in Tabular. Right?
Generally, it throws this error when the internal code is accessing the property of an empty object. As you mentioned it happens when you make changes on a table, mostly it means that table is already a empty object. Please re-process your tabular to see
if this table is still existing.
If you have any question, please feel free to ask.
Simon Hou
TechNet Community Support

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I followed the example provided in
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DROP PROCEDURE [PATIENT_updatemetadata];
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-- BEGIN Create Scope Config Table named [scope_config]
IF NOT EXISTS (SELECT t.name FROM sys.tables t JOIN sys.schemas s ON s.schema_id = t.schema_id WHERE t.name = N'scope_config' AND s.name = N'dbo')
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being modified? Do I have to make changes in scope_info?
Thanks
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Howard P. Weiss

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DROP PROCEDURE [PATIENT_insertmetadata];
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DROP PROCEDURE [PATIENT_deletemetadata];
-- BEGIN Enable Snapshot Isolation on Database 'PatScan' if needed
IF EXISTS (SELECT NAME FROM sys.databases where NAME = N'PatScan' AND [snapshot_isolation_state] = 0)
BEGIN
ALTER DATABASE [PatScan] SET ALLOW_SNAPSHOT_ISOLATION ON
END
GO
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-- BEGIN Create Scope Info Table named [scope_info]
IF NOT EXISTS (SELECT t.name FROM sys.tables t JOIN sys.schemas s ON s.schema_id = t.schema_id WHERE t.name = N'scope_info' AND s.name = N'dbo')
BEGIN
CREATE TABLE [scope_info] ([scope_local_id] int IDENTITY(1,1) NOT NULL, [scope_id] uniqueidentifier DEFAULT NEWID() NOT NULL, [sync_scope_name] nvarchar(100) NOT NULL, [scope_sync_knowledge] varbinary(max) NULL, [scope_tombstone_cleanup_knowledge] varbinary(max)
NULL, [scope_timestamp] timestamp NULL, [scope_config_id] uniqueidentifier NULL, [scope_restore_count] int DEFAULT 0 NOT NULL, [scope_user_comment] nvarchar(max) NULL)
ALTER TABLE [scope_info] ADD CONSTRAINT [PK_scope_info] PRIMARY KEY ([sync_scope_name])
END
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-- BEGIN Create Scope Config Table named [scope_config]
IF NOT EXISTS (SELECT t.name FROM sys.tables t JOIN sys.schemas s ON s.schema_id = t.schema_id WHERE t.name = N'scope_config' AND s.name = N'dbo')
BEGIN
CREATE TABLE [scope_config] ([config_id] uniqueidentifier NOT NULL, [config_data] xml NOT NULL, [scope_status] char NULL)
ALTER TABLE [scope_config] ADD CONSTRAINT [PK_scope_config] PRIMARY KEY ([config_id])
END
GO
-- END Create Scope Config Table named [scope_config]
In an already provisioned database, the scope_info and scope_config tables already exist. Hence the portions of the script to create the scope_info and scope_config tables are skipped. I tried modifying the query to drop these tables. When
I do so, ne tables are created but they only define the modified table.
Is it necessary to update scope_info and scope_config? Are there are side effects (such as deprovisioning) if I drop and then recreate these tables? Can I just update the existing scope_config, replacing the portion of the XML which defines the table
being modified? Do I have to make changes in scope_info?
Thanks
Howard Weiss
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Edited by: Stanisa on 24.02.2010. 14.45

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SSAS Tabular - Adding Column to a table gives error "Object reference not set to instance of object"

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