I have a Search Sort on my template to search via Project Name.

When search the record appears as I expect.

When I click on my Edit button for the record I get the following:

:Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page

If I don't search and just select a record, the Edit form shows up as expected.

Here is my Search Sort:

<SearchSort

FilterExpression="ProjectName LIKE '%{0}%'"

SearchLabelText="Project Number:"

SearchButtonText="GO"

SortFieldNames="ProjectName, ProjectLocation, ProjectOwner, DateCreated"

SortFieldLabels="Project Number,Project Location, Project Owner, Date Created"

SearchBoxCssClass="form-control"

SearchButtonCssClass="btn btn-default"

SortButtonText="Go"

SortButtonCssClass="btn btn-default"

SortFieldListCssClass="form-control"

>

<h1 >  Qualifications and Exceptions Manager

</h1>

<br>

<div>

<div>

<div>

<div>

<label>Project Number</label>

{SearchBox}

<span>

{SearchButton}

</span>

</div>

</div>

</div>

<div>

<div>

<div>

<label>Sort</label>

{SortFieldList}

{SortButton}

</div>

<div>

<div>

<label>

{ReverseSort} Reverse

</label>

</div>

</div>

</div>

</div>

</div><br/>

</SearchSort>