Hi Everyone, On SAIL form, I am using Paragraph field to Write descri

A number of SAIL examples can be found in the help pages covering exactly what you're asking and many other scenarios so I suggest you read through them:
forum.appian.com/.../SAIL_Recipes.html
It sounds like you want the component to not allow further entry at your size limit but this is not possible.

It seems that it might be possible to tweak the SaveInto's in such a way that once the limit is reached, it refuses to save any further characters - however this would require using "refresh after keypress" and it seems that it would be costly in terms of performance.

I suggest looking into what Tim suggests - I've done something similar myself, where the field fails validation if it's over X characters (where X is the limit), and the validation message says something like "The limit is X characters; currently entered: Y characters" (so the user has some gauge on how "over" they are).

You could use:
saveInto: a!save(ri!myVar, left(save!value, 170))

Why don't you use len() function in validation, if (len ri!YourVariable>170, "Value exceeding 170 chars", {})