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AbortProtect[expr]

evaluates expr, saving any aborts until the evaluation is complete.

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AbortProtect

AbortProtect[expr]

evaluates expr, saving any aborts until the evaluation is complete.

Details

Examples

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Basic Examples  (2)

Protect part of a computation from early termination:

Wolfram Language code: AbortProtect[Abort[];Print[a]];Print[b]

Use AbortProtect to ensure an assignment is made:

Wolfram Language code: AbortProtect[x = (3;Abort[];4)]

Although the computation returned $Aborted, x was assigned the value of the computation:

Wolfram Language code: x

Without the AbortProtect, the assignment would not have been made:

Wolfram Language code: y = (3;Abort[];4)
Wolfram Language code: y

Scope  (1)

Make sure that an iteration is finished in a time-constrained computation:

Wolfram Language code: TimeConstrained[x = 1 / 10;Do[AbortProtect[imax = i;x = 4 x(1 - x)], {i, 1000000}], 1];{imax, N[x]}

Without AbortProtect, typically imax is updated, but not x:

Wolfram Language code: Table[TimeConstrained[x = 1 / 10;Do[imax = i;x = 4 x(1 - x), {i, 1000000}], .5]; {imax, N[x]}, {4}]

Properties & Relations  (5)

CheckAbort enables and detects aborts even if enclosed within AbortProtect:

Wolfram Language code: AbortProtect[ CheckAbort[Echo["before"];Abort[];Echo["after"], Echo["check"]]]

While the computation inside the CheckAbort is terminated, AbortProtect runs to completion:

Wolfram Language code: AbortProtect[ CheckAbort[Echo["before"];Abort[];Echo["after"], Echo["check"]];Echo["past CheckAbort"]]

An enclosing AbortProtect is overridden by TimeConstrained:

Wolfram Language code: AbsoluteTiming[AbortProtect[TimeConstrained[Pause[3];Echo["eval"], .1, Echo["constraint"]]]]

While code inside the TimeConstrained is terminated, AbortProtect runs to completion:

Wolfram Language code: AbsoluteTiming[AbortProtect[TimeConstrained[Pause[3];Echo["eval"], .1, Echo["constraint"]];Echo["past TimeConstrained"]]]

A nested AbortProtect can block the action of TimeConstrained:

Wolfram Language code: AbsoluteTiming[TimeConstrained[AbortProtect[Pause[3];Echo["eval"]], .1, Echo["constraint"]]]

An enclosing AbortProtect is overridden by MemoryConstrained:

Wolfram Language code: AbortProtect[MemoryConstrained[RandomReal[1, 10^5];Echo["eval"], 10^4, Echo["constraint"]]]

While code inside the MemoryConstrained is terminated, AbortProtect runs to completion:

Wolfram Language code: AbortProtect[MemoryConstrained[RandomReal[1, 10 ^ 5];Echo["eval"], 10^4, Echo["constraint"]];Echo["past MemoryConstrained"]]

A nested AbortProtect can block the action of MemoryConstrained:

Wolfram Language code: MemoryConstrained[AbortProtect[x = Range[10^4];Echo["eval"]], 10^2, Echo["constraint"]]
Wolfram Research (1991), AbortProtect, Wolfram Language function, https://reference.wolfram.com/language/ref/AbortProtect.html.

Text

Wolfram Research (1991), AbortProtect, Wolfram Language function, https://reference.wolfram.com/language/ref/AbortProtect.html.

CMS

Wolfram Language. 1991. "AbortProtect." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/AbortProtect.html.

APA

Wolfram Language. (1991). AbortProtect. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/AbortProtect.html

BibTeX

@misc{reference.wolfram_2026_abortprotect, author="Wolfram Research", title="{AbortProtect}", year="1991", howpublished="\url{https://reference.wolfram.com/language/ref/AbortProtect.html}", note=[Accessed: 12-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_abortprotect, organization={Wolfram Research}, title={AbortProtect}, year={1991}, url={https://reference.wolfram.com/language/ref/AbortProtect.html}, note=[Accessed: 12-June-2026]}