Product(s):	AECOsim Building Designer
	Version(s):	V8i (08.11.09.866)
	Environment:	N/A
	Area:	General
	Subarea:	VBA Error

Problem Description

As AECOsim Building Designer opens a dialog with the error message is repeatedly displayed:

VBA Error:
Class not registered.
Looking for object with CLSID:{AC9F2F90-E877-11CE-9F68-00AA00574A4F}

Steps to resolve

Please note that resolving VBA problems may require the intervention of your IT support teams or services as these are primarily Windows system matters. Some level of administrative permission is needed for most of the potential solutions.

This is caused by the fm20.dll module not being registered correctly with Windows, this can occur as Microsoft allow multiple applications to modify the registration of VB\VBA dll's during installation that sometimes leasd to registration errors.

First find fm20.dll to confirm that it is present, it will be in different locations according to the operating system version, 32-bit versions will store it in C:\Windows\System32\, 64-bit versions in C:\Windows\SysWOW64\

For 32-bit:

 a. Click on start
 b. Type command prompt in the start search bar and right click on it and select Run as administrator.
 c. Now at the command prompt type Regsvr32 fm20.dll, press Enter

For 64-bit

 a. Click on start
 b. Type command prompt in the start search bar and right click on it and select Run as administrator.
 c. Type cd C:\Windows\SysWOW64\
 d. Now at the command prompt type Regsvr32 fm20.dll, press Enter

The following message should appear:

DllRegisterServer in c:\windows\system\fm20.dll succeeded.

The file Fm20.dll should be registered correctly.