When trying to add attentional Command Line into and existing Software Component.
After clicking Save you noticed date modified date on top right does not change.
Checking SMP log you discover
Failed to save resource data: guid=[GUID]c, table=Inv_Software_Component
Invalid object name 'ResourceTypeDataClassChanges'.
Missing table from SymantecCMDB indicating a possible corruption on the DB
As one option you can just restore the class change table directly from SQL studio using query:
USE [Symantec_CMDB]
GO
/****** Object: Table [dbo].[ResourceTypeDataClassChanges] ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[ResourceTypeDataClassChanges](
[_id] [bigint] IDENTITY(1,1) NOT NULL,
[ResourceTypeGuid] [uniqueidentifier] NOT NULL,
[ResourceDataClassGuid] [uniqueidentifier] NOT NULL,
[Type] [nchar](1) NOT NULL,
[ModifiedDate] [datetime] NOT NULL,
PRIMARY KEY CLUSTERED
(
[_id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[ResourceTypeDataClassChanges] ADD DEFAULT (getdate()) FOR [ModifiedDate]
GO