Informix Error -50108: Attempt to set a negative tabIndex in ixControl::setTabIndex(). The tabIndex will not be changed (tabIndex must be positive or noTab).

Reasons / Common Causes

-50108 is raised by the ixControl class in the Window Painter GUI builder library — per the official guidance:

If the program attempts to set a negative tab index for the control, ixControl::setTabIndex() generates this message. Negative tab indexes are not supported. The request is ignored.

1. Attempt to set a negative tabIndex in ixControl::setTabIndex(). The tabIndex will not be changed (tabIndex must be positive or noTab), per the official guidance — the direct, documented condition.

Solutions / Resolution

1. No corrective action is required at the engine/runtime level — the disallowed call is simply ignored, per the official guidance — but the calling code should still be fixed, since relying on the ignore behavior masks a real logic error.

Examples

N/A

No specific triggering statement is documented beyond the class-library condition described above.

Diagnostic Checks

1. Check the specific value, object state, or call sequence that ixControl flags here, against the constraint the official guidance describes.

Related Errors / Related Topics

• -50109 — "Attempt to set a negative tabIndex in ixControl constructor. Using defaultTabOrder instead (tabIndex must be positive, noTab, or defaultTabOrder)." Another ixControl-related condition in this set.

Attempt to set a negative tabIndex in ixControl::setTabIndex(). The tabIndex will not be changed (tabIndex must be positive or noTab).