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Performing maintenance on a given database, a fellow team mate found the need to drop an old workload baseline. He tried it through Enterprise Manager, as well on SQL Developer, but it always failed with the message bellow:

ORA-13527: invalid baseline name
ORA-06512: on "SYS.DBMS_WORKLOAD_REPOSITORY", line 581
ORA-06512: on line 1
13527. 00000 -  "invalid baseline name"
*Cause:    The operation failed because the specified baseline name
           does not exist in the Workload Repository.
*Action:   check the baseline name and retry the operation.

At first we thought it to be caused by some special character on the baseline’s name, but then we found a document on Oracle Support entitled “ORA-13527 While Dropping Baseline (Doc ID 1450716.1)”.

The error occurs on Enterprise Manager for Oracle Database - Version 11.2.0.1 to 11.2.0.3, when when trying to drop baseline whose name is over 30 bytes.

As a temporary workaround, it is suggested to rename the baseline name to less than 30 bytes and then drop it.

Workaround URL: Oracle Support Document 1450716.1 (ORA-13527 While Dropping Baseline)

Trying to install Virtualbox on my latest Windows 8 machine, the result was always the same, a screen like the one below:

The error message is irrelevant, if you google for it you’ll get mostly useless rants. The cause for my problem as well as the solution was to enable hardware virtualization support on the BIOS setup:

Hope this helps someone.

Last night I finally installed Windows 8 RTM on my laptop. Having tried and enjoyed the developer’s preview, everything was thumbs up until I tried to activate the software and prove it genuine. The process didn’t ask me for the 5x5 digit key (seemed like it already had one) and it presented the following error message:



After searching the Web for a solution, I found out here that this might happen when you get your installation media from MSDN or Technet and try to install and activate outside your corporate network. The activation wizard  by default will look for a Key Management Service (KMS) host on your internal network. It will not try to activate using the internet to reach Microsoft Activation servers.

I tried the suggested solution, which is to open an elevated CMD prompt and run the following command, as shown below::



It still didn’t work, reporting an invalid key error. My installation media is not illegal or counterfeit software, so I edited the file “slmgr.vbs” and examined the script content. There was an option to uninstall the existing product key:



After executing the script with the “upk” option, I simply pressed the “Activate” button again, it asked for my activation key and worked like a charm:



Hope this helps!

Trying out Umbraco to get a feel on the ease of use and potential professional use, I got the following error when trying to start the site based on the simple starter kit :

 This was disappointing, especially because we're talking about a fresh install and I hadn't fiddled with it yet.
After some scouring on the Web taking into account Umbraco was complaining about the umbraco.cms.businesslogic.macro.MacroModel, I found the solution was to edit the starter kit template so it wouldn't use macros that were not installed. So, first step, go to the Umbraco administration site and navigate to the "Developer" screen:

Expand the "Macros" node on the tree and check what macros you've got installed and take note of their aliases:
Next navigate to the "Settings" screen:
Then choose templates and the "StarterKit Master" template:
In the editor, search for any macro which has an alias that doesn't match any of the currently installed. In my case it was the "BlogFeedRssLink":
After removing this line and saving the template, the site worked fine.