Version española here


Versione Italiana  here

special credits :
CONAHCYT (Mexico):
Proyectos Ciencia Basica:
CB-2012/184060
CB-2016/286764


Why SSAP?



General
characteristics


Technical Manual (PDF)


(UPDATED VERSION
AVAILABLE, rel. 5.2
February 26, 2023)

SSAP CODE VALIDATION DOCUMENT
(version 1.4 ) (PDF)

 
DOWNLOAD SSAP


SUPPORT SSAP !!

News and Bugs fixes
[last updated 22-04-2026]


Installation procedures
(last updated 22-02-2026)


Didactic Videos
[last updated 23/08/2023]

SSAP examples
on the WEB
[last updated 22/02/2026]

Conditions
 Free license of use

Implementation of European Regulation 679/2016 for Privacy called GDPR


" The process of preparing programs for a digital computer is especially attractive, not only because it can be economically and scientifically rewarding, but also because it can be an aesthetic experience much like
composing poetry or music."
Donald Knuth  
"The Art of Computer Programming"


Dr. Geol. Lorenzo Borselli*, Ph.D.
Professor of Geotechnics
and Engineering Geology 
Institute of Geology,
Faculty of Engineering Autonomous University of San Luis Potosì (UASLP)
 San Luis Potosí,SLP - MEXICO


*Associate Researcher
 CNR - IRPI 
 Research Institute for
Hydrogeological Protection
  ITALY


E-mail:
   


Personal web pages:
https://www.lorenzo-borselli.eu

  CV of Lorenzo Borselli,
in PDF format ( Here )

SSAP2010 is a complete freeware software for verifying the stability of natural and artificial slopes or with reinforcement elements.  It is an advanced tool, developed in more than 35 years of work. SSAP provides users with a set of original tools to carry out in-depth stability checks using only rigorous calculation methods based on Limit Equilibrium and Innovative Engines for generating and searching for surfaces with the lowest Safety Factor (Fs). A Windows WIN 11 GUI and a set of software tools for slope model assembly, graphical visualization and reporting (general features of the program ).

Wps Office Macros Cannot Be Run Because The Vba Support Library Is Not Installed Hot

The following solutions are recommended based on the platform and version in use.

| Step | Action | |------|--------| | ✅ | Download & install official WPS VBA add-in | | ✅ | Restart WPS Office | | ✅ | Enable macros in Trust Center settings | | ✅ | Upgrade to Professional if needed | | ✅ | Switch to MS Office for heavy macro use |

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If you continue to see the error after installing the VBA library, please specify:

Then I can provide more targeted assistance.

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Rating: 3 / 5

Summary WPS Office is a lightweight, affordable alternative to Microsoft Office with strong compatibility for common document formats. However, users relying on Excel-style VBA macros can run into a critical roadblock: macros sometimes fail with the error "VBA support library is not installed," preventing macro execution entirely. That limitation significantly reduces WPS's usefulness for power users and organizations that depend on automation.

What I liked

What’s problematic

Who this is for

Workarounds and suggestions

Bottom line WPS Office is a solid, lightweight Office suite for general editing and basic spreadsheets, but the "VBA support library is not installed" issue makes it unsuitable as a drop-in replacement for users who depend on Excel macros and automation. If macros are central to your workflow, stick with Microsoft Office or adopt an external automation approach.

The error message "macros cannot be run because the VBA support library is not installed" in WPS Office typically occurs because the Visual Basic for Applications (VBA) environment is not included in the standard free version of the software. Unlike Microsoft Office, where VBA is often pre-installed, WPS Office treats it as an optional add-in or a feature reserved for specific versions. Why This Happens

Version Limitation: The standard free version of WPS Office usually lacks the required VBA components to execute macros.

Missing Plugin: Even if your version supports it, the VBAxWPS.exe (the support library) may not have been selected during initial installation or may have failed to install.

Security Settings: In some cases, the library exists, but the "Developer" tab or macro execution is disabled by default. How to Fix the Error

To resolve this, you need to manually install the support library or upgrade your version.

The error message "macros cannot be run because the VBA support library is not installed" typically occurs because WPS Office Personal/Free editions do not include Visual Basic for Applications (VBA) by default. While WPS Office is highly compatible with Microsoft Office formats, VBA is a proprietary Microsoft technology that WPS must license separately, which is why it is generally reserved for paid or enterprise versions.  1. Root Cause: Edition Limitations  The following solutions are recommended based on the

The most common reason for this error is that you are using a version of WPS Office that lacks the VBA module.  WPS Free/Personal: Does not natively support VBA macros.

WPS Professional/Enterprise: These editions often include the necessary VBA support library.

Missing Plugin: Even in some versions that could support it, the "VBA for WPS" plugin might not have been included in the initial installation.  2. Primary Fix: Install the VBA Support Library 

To run macros, you must manually add the VBA environment to your WPS installation. 

Official WPS VBA 7.1: You can download the WPS VBA 7.1 add-in directly from the WPS Academy or official WPS Support pages.

Installation Process: Ensure WPS Office is completely closed before running the installer. Once installed, the "Developer" tab should become active, providing access to the Visual Basic Editor and Macro settings.

Verification: Press Alt + F11 inside WPS Writer or Spreadsheets. If the VBA Editor opens, the library is correctly installed.  3. How to Enable Macros After Installation 

Once the library is present, you must enable the functionality within the software:  Open WPS Spreadsheets or Writer. Go to the Menu (top-left) and select Options. If you continue to see the error after

Choose Customize Ribbon and ensure the Developer tab is checked.

Navigate to the Developer tab on the main ribbon and click Macro Security to allow macros to run (choose "Disable all macros with notification" for a balance of security and function).  4. Compatibility Warnings 

Even with the library installed, compatibility is not 100% identical to Microsoft Excel. 

Standard VBA: Most basic automation and standard commands will work.

Complex APIs: Macros that make deep calls to unique Microsoft Office APIs or specific ActiveX controls may still fail or require code "tweaks".

Alternatives: For users who cannot get VBA working, LibreOffice is an open-source alternative that supports VBA macros natively without additional paid plugins. 

To understand the error, one must first understand what VBA is. VBA is a programming language developed by Microsoft, deeply embedded within Microsoft Office applications like Excel, Word, and Access. When a user records a macro or writes custom code in Excel, that code is interpreted and executed by the VBA runtime library—a collection of files (e.g., VBE7.DLL) that Microsoft licenses to third-party developers.

WPS Office, developed by Chinese software company Kingsoft, deliberately built its suite to be highly compatible with Microsoft Office file formats (.docx, .xlsx, .pptx). However, to reduce software bloat, licensing costs, and potential legal exposure, Kingsoft does not include the Microsoft VBA library in its standard, free distribution of WPS Office. Consequently, when a user opens a spreadsheet containing VBA macros in standard WPS Office, the software recognizes the request to run the macro but cannot find the necessary interpreter. Hence, the error: "the VBA support library is not installed." Then I can provide more targeted assistance

Users migrating to Linux or macOS versions of WPS Office frequently encounter this error. The VBA engine is deeply integrated into the Windows architecture. The Linux version of WPS Office, in particular, has historically struggled with full VBA compatibility, often lacking the necessary Windows emulation layers to run standard VBA macros.

SSAP2010 is the result of a long development work started in 1990 which saw the collaboration of many users who have made a notable contribution through constructive criticisms and suggestions. This version is the direct evolution of the first version of the SSAP code starting from 1991, culminating with version 3.0 (SSAP2006) of December 2006.  From version 4.0 (SSAP2010) , December 2010, the SSAP software is available as entirely freeware software ( that is free and of free use ..).
Version 4.0 of SSAP2010 was an important milestone in the development of this software. It was the first version completely free to use for all those who, for study and work reasons, are interested in carrying out slope stability checks with rigorous limit equilibrium calculation methods., for natural and artificial slopes and / or with reinforcement works such as (reinforced earth, piling, tie rods, anchored adrenza nets, gabions).
Version 5.2 of SSAP 2010 has been a major release, with extended technical documentation, freely available to all Users.
The current version 6.1  remains freeware, entirely free to use, in continuous development. It is expected that on average every 3 months a new update will appear.



The continuous evolution of the program was guided by the aim of creating a professional tool with a high technical level and easy accessibility to the widest possible range of users. The continuous work of development, testing and verification of the fundamental and original algorithms that constitute the heart of the program has made it possible to create a new version (version 6.0)  with new important features andequipped with a graphic interface that simplifies the use for users.

SSAP2010 graphical interface: additional options for stability checks