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Limitations of WINDEV, WEBDEV and WINDEV Mobile
The limitations presented in this document affect: - the project.
- windows.
- controls.
- menus (drop-down or context menu).
- events.
- image formats.
- analyses, data file descriptions, items.
- physical HFSQL data files.
- physical xBase data files.
- WINDEV libraries (WDL).
- WINDEV executables.
- the setup program.
| | | | Limitations of the project |
|---|
| Windows per project: Maximum number | Unlimited | | Project languages: Maximum number | 20 | | Procedures per project: Maximum number | 5,000 procedures for each project element (window, report, set of procedures, ...) | | Classes per project: Maximum number | 8,000 classes | | Variables of a project (global or local variables): maximum number | 65,500 variables | | Processes of a project: Maximum number of lines | 65,500 lines | | Elements in a component (windows, collections, variables, classes, members, procedures, ...): Maximum number | 65,500 elements |
| | | | Limitations of the windows |
|---|
| Maximum dimensions | 32,000 x 32,000 pixels | | Maximum number of controls per window | Greater than 5,000.
This limit can be less depending on the operating system used. | | Logical name of a window: maximum number of characters | 255 characters | | Languages selected for a window: Maximum number | 64 | | Windows opened simultaneously at runtime: maximum number | This limit varies depending on the available memory and to the number of controls in each window. | | Variables of a window (global or local variables): maximum number | 65,500 variables | | Window process: maximum number of lines | 65,500 lines |
| | | | Limitations of the different types of controls |
|---|
| Control: maximum dimensions | 32,000 x 32,000 pixels | | Logical name of a control: Maximum number of characters | 255 characters | | Control process: maximum number of lines | 65,500 lines | | Edit control: maximum number of characters | 2 billion (2 GB) characters | | Multiline edit control: Maximum number of lines | 2 billions (2 GB) of lines and 2 billions (2 GB) characters | | Static Text control: maximum number of characters | - If the static control caption is entered in the editor: 2 billion characters (2GB),
- if the caption is assigned through programming:variable limit according to the available memory.
| | Image control: maximum dimensions | Unlimited | | Image field: Maximum number of images that can make up a moving image. | Width x Height (in pixels) of the reference image | | Check Box control or Selector field: maximum number of options | 256 options | | List or Combo Box control: maximum number of elements | 5 millions elements | | Field Table populated programmatically: Maximum number of lines | 5 millions lines
Change according to the available memory. | | Table field (programmatic or file): Maximum number of columns | 1 million columns | | Table field (programmatically or by file): Maximum number of cells | Dozens of millions of cells | | Table field (programmatically or by file): Maximum number of characters in a line | 2 billion (2 GB) characters maximum per row (for all the columns) | | Column in a Table field (programmatically or in a file): Maximum width | 32,000 pixels | | Text column of a Table field (programmatically or in a file): Maximum number of characters | 2 billion (2 GB) characters | | TreeView control: maximum number of elements | No limitations |
| | | | Limitations of the menus |
|---|
| Options and sub-options in a menu: Total maximum number | 2 billions (2 GB) of options and sub-options | | Level of options in a menu: maximum number | 2 billions (2 GB) of option levels | | Caption of a menu option: maximum number of characters | 2 billion (2 GB) characters | | Help message of the menu option: maximum number of characters | 2 billion (2 GB) characters | | Processes of a menu option: maximum number of lines | 65,500 lines |
| | | | Limitations on events / procedures / classes |
|---|
Maximum number of lines in:- an event linked to an element (project, window, control, etc.)
- a procedure (local or global)
| 65,500 lines | | Maximum number of languages selected for the code | 20 | | Program line: maximum number of characters | 1,000 characters | | Procedure | Maximum number of parameters | 255 parameters | | Procedure | Name: maximum number of characters | 255 characters | | Nested Loop | Maximum number | 140 nested loops | | Class | Maximum number per project | 8,000 classes | | Class | Maximum number of members | 65,500 members | | Class | Name: maximum number of characters | 255 characters | | Variable (global or local) | Maximum number in a project | 65,500 variables | | Variable (global or local) | Maximum number in a window | 65,500 variables | | Variable (global or local) | Maximum number in a process | 65,500 variables | | Variable | Name: maximum number of characters | 255 characters | | Variable | String type: maximum number of characters | Limit depending on the available memory | | Variable | Fixed string type: maximum number of characters | 65,500 characters | | Variable | ASCIIZ string type: maximum number of characters | 65,500 characters | | Variable | Pascal string type: maximum number of characters | 255 characters | | Variable | Array type: maximum number of dimensions | 3 dimensions | | Variable | Array type: limit of dimension | Limit depending on the available memory |
The following image formats are supported in Windows: - Bitmap (*.BMP)
- Graphics Interchange Format (*.gif)
- Joint Picture Experts Group (*.jpg ; *.jpeg)
- Kodak Photo CD (*.pcd)
- PaintBrush (*.pcx)
- Adobe Photoshop Format (*.psd)
- TrueVision TARGA (*.tga)
- Tagged Image File Format (*.tif ; *.tiff)
Note: the "Tiled TIFF" option in TIFF 6.0 is not supported. In this case, we advise you to save the image in tiff 5.0 standard. - Portable Network Graphics (*.png)
- Windows MetaFiles (*.emf ; *.wmf)
- Icons (*.ico ; *.icw)
Remarks: - HQ display (High Quality) available.
- Management of sheets in transparent BMP format (32 bits).
- Cursors (*.cur)
- Portable Document Format (*.pdf)
- Scalable Vector Graphics (*.svg)
- WINDEV images (generated by the image editor, *.WDPIC).
 Novedad versión 2025Images in WebP format (*.webp).
Remarks: - BMP, ICO, CUR and OS2 images used in windows are automatically handled by wd300obj.dll.
In all other cases, wd300pnt.dll must be installed with the other WINDEV DLLs. - PDFs displayed in Image controls use the wd300pnt.dll library
| | | | Limits on analyses, data file descriptions, headings |
|---|
| Analysis | Maximum size of the ".WDD" file | Unlimited | | Analysis | Maximum number of data file descriptions | 65,535 files | | Analysis | Maximum number of items | 65,535 items | | Analysis | Maximum number of links | 65,535 links | | Analysis | Maximum number of analysis generations | 231 (over 2 milliards) of generations | | Data file description | Logical name: maximum number of characters | 255 characters | | Data file description | Maximum number per analysis | 65,535 files | | Data file description | Maximum number of items | 65,535 items | | Data file description | Maximum number of bindings per data file | 65,535 links | | Data file description | Maximum number of keys | 65,353 keys | | Data file description | Maximum size of all the keys | 2 GB | | Item | Logical name: maximum number of characters | 255 characters | | Item | Maximum number per analysis | 65,535 items | | Item | Maximum number per data file | 65,535 items | | Item | Maximum number in a composite key | 65,535 items | | Item | Maximum size | 65,535 bytes (except 255 bytes for Turbo Pascal Windows files in language format) | | Item | Maximum size of a memo item (text or binary) | 4 GB | | Item | Maximum size of a binary string | 65,533 bytes | | Item | Maximum number of elements in an array of items | 255 elements | | Key | Maximum number per data file description | 65,353 keys | | Key | Maximum size of all keys in a data file | 2 GB | | Key | Maximum size of a key (composite or simple) | 65,535 bytes | | Key | Maximum number of items in a composite key | 65,535 items | | Record | Maximum size | 2 GB | | Record | Minimum size | 16 bytes |
| | | | Limitations of the physical data files, index files and memo files in HFSQL format |
|---|
Maximum size of:- Data file (*.FIC)
- Transaction file (*.FIC)
- Log file (*JNL.FIC)
| 1024 TB | | Index file (*.NDX): maximum size | 1024 TB | | Memo file (*.MMO): maximum size | 1024 TB | | Files open at the same time: maximum number | Unlimited | | Blocked records per data file: Maximum number | Unlimited | | Records per data file: Maximum number | Depends on record size (for a 20-byte record: 329 million billion records maximum, for a 4,096-byte record: 2 million billion records maximum). | | Data file password: maximum number of characters | Unlimited | | .REP file: maximum number of characters for the full name of the physical file | 255 characters | | REP file: Maximum number of characters for the logical name of the data file | 255 characters |
| | | | Limitations of xBase files |
|---|
| Record | Maximum number per data file | Unlimited | | Record | Maximum size | - Clipper5 file: 8,192 bytes
- Others: 4,000 bytes
| | Record | Maximum number per index file | Unlimited | | Record | Maximum number per memo file | Unlimited | | Item | Maximum number per data file | - dBase 4 file: 255 items
- DBX file: 512 items
- Clipper 5 file: 1,023 items
- others: 128 items
| | Item | Maximum size of a text item | - Clipper 5 file: 2,048 bytes
- Others: 254 bytes
| | Item | Maximum size of a numeric item | - dBase 4 file: 20 bytes
- FoxPro file: 20 bytes
- Others: 19 bytes
| | Item | Maximum size of decimal numeric item | - dBase file: 18 bytes
- FoxPro file: 18 bytes
- Others: 15 bytes
| | Item | Name: maximum number of characters | 10 characters | | Key | Maximum size | 65,535 bytes | | Key | Name: maximum number of characters | 10 characters | | Key expression | Maximum size | 100 bytes | | Key expression | Authorized functions | DTOC, DTOS, Left, Right, Upper, Lower, STR, SUBSTR | | Index | Maximum number in an MDX file | 47 indexes | | Text memo | Maximum number of characters written | 24,576 characters. |
| | | | Limitations of the libraries |
|---|
| Maximum size of library file (".WDL" file) | Available size on disk (or up to 2 GB) | | Maximum number of elements | Unlimited |
| | | | Limitations of the executables |
|---|
| Maximum size of executable program ( ".EXE" file) | Available size on disk (or up to 2 GB) |
| | | | Limitations of the setup program | | Supported languages | Maximum number | 20 languages | | Components | Maximum number | 500 components | | File groups | Maximum number | 500 groups of files | | Update | Maximum number of analyses that can be taken into account by a single update | 100 analyses
Each update can automatically modify the data files belonging to 100 different analyses. | | DLL | Maximum number of DLLs associated with a custom setup program | 500 DLLs | Reminder: The WINDEV application installer can be created with:- In the "Proyecto" pane, in the "Generación" group, click on "Procedimiento de instalación".
- WDInst installation editor: in the "Herramientas" pane, in the "Utilidades" group, click on "WDInst".
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