The table below summarizes some of the Survey Solutions limits.
It is not advisable to design a questionnaire or rely on a work flow that
is balancing on the margin of these limits.
| Limit | Value |
|---|---|
| Maximum number of questions in a section: | 400 [questions] |
| Maximum number of roster elements in a single roster (including rosters nested into it): (applies to versions older than v24.06) | 10,000 [items] |
| Maximum number of roster elements in the whole questionnaire: | 80,000 [items] |
| Maximum question text length: | 2,000 [characters] |
| Maximum length of a variable label: | 80 [characters] |
| Maximum variable name length for most question types: | 32 [characters] |
| Maximum variable name length for GPS and some other question types: | 20 [characters] |
| Maximum number of GPS questions marked as prefilled: | 1 [question] |
| Maximum nesting depth for rosters: | 4 [levels] |
| Maximum nesting depth for sub-sections (not including the section level): | 9 [levels] |
| Maximum number of items in a roster: (for versions older than v24.06 it is 60 [items]) | 200 [items] |
| Maximum number of items in a simple roster: | 200 [items] |
| Maximum number of questions* in a roster to qualify as a simple roster: | 30 [questions] |
| Maximum number of questions in a roster to be shown in plain mode: | 10 [questions] |
| Minimum number of items in a categorical question: | 2 [items] |
| Maximum number of items in a categorical question: | 15,000 [items] |
| Maximum number of items in a categorical question (with all options visible to interviewer): | 200 [items] |
| Maximum number of validations (rules and messages) that can be attached to a single element: | 10 [validations] |
| Maximum number of suggestions in a combobox categorical question: | 50 [items] |
| Maximum length of a category label in a categorical question: | 250 [characters] |
| Maximum number of list items in a text list question type: | 200 [items] |
| Maximum length of response to a text question type that can be entered: (This limit does not apply to content that is pre-loaded by file upload method) | 750 [characters] |
| Earliest date that can be entered into a date question: | 1 January 1900 |
| Latest date that can be entered into a date question: | 31 December 2100 |
| Maximum length of a syntax condition: | 10,000 [characters] |
| Maximum length of an error message: | 250 [characters] |
| Maximum number of decimals in a numeric question: | 15 [digits] |
| Maximum number of data rows in a lookup table: | 15,000 [rows] |
| Maximum number of data columns in a lookup table: | 10 [columns] |
| Recognized barcode formats: | see list |
| Supported graphic file formats for upload to static text: | .jpg & .png |
| Maximum size of a single image for upload to static text (larger images result in warnings): | 5 [MB] |
| Maximum image dimensions for upload to static text: | 4,096 x 4,096 [pixels] |
| Maximum size of the longer side of captured images: | 1024 [pixels] |
| Maximum duration of record in audio question: | 3 [minutes] |
| Maximum size of the assignments preload file: | 300 [MB] |
| Maximum size of the (compressed/zipped) map preload file: | 500 [MB] | Maximum size of any (decompressed/unzipped) map preload file: | 512 [MB] |
| Maximum size of the questionnaire (not including attachments) | 5 [MB] |
| Minimum length of a required password**: | 10 [characters] |
| Maximum number of user accounts that can be created in a single batch: | 10,000 [accounts] |
| Maximum size of an image for Headquarters login page: | 10 [MB] |
| Maximum number of markers*** in Headquarters map report: | 50,000[markers] |
| Reserved value (numeric variable types): | -999,999,999 |
| Reserved value (string variable types): | ##N/A## |
| Length of an internally generated case ID (GUID): | 32 [hexadecimal digits] |
| Maximum length of a comment to a question: | 750 [characters] | Maximum length of a comment to an assignment: | 500 [characters] | Maximum length of a comment to approval/rejection transaction: | 200 [characters] |
| Timeout for inactive web-interviewing sessions: | 15 [minutes] |
| Maximum number of unsuccessful login attempts before a CAPTCHA gets activated: | 5 [attempts] |
| Maximum length of a customized notification email email templates | 1,000 [characters] |
| Maximum number of interviews that can be requested in a finite assignment: (Infinite-size assignments are not affected by this limit). | 10,000 [interviews] |
| Minimum value for accuracy of location detection in automatic and semi-automatic modes in geography questions: | 1 [meter] |
| Maximum value for accuracy of location detection in automatic and semi-automatic modes in geography questions: | 1,000 [meters] |
| Minimum value for frequency of location detection in automatic mode in geography questions: | 5 [seconds] |
| Maximum value for frequency of location detection in automatic mode in geography questions: | 1,000 [seconds] |
*) in addition to the limit on number of questions a roster may not contain nested rosters to qualify as a simple roster, read more details here; as of v24.06 there is no longer a distinction between a roster and a simple roster.
**) in addition to the requirement for password complexity: at least one digit, at least one lower case character, and at least one upper case character;
***) Since version 18.12 large number of markers will be clustered on the server before being shown on the map.