Why is there a 256 character limit?
Manage campaignsNext: Manage landing pages Show See below for a quick reference to quantity and character limits in Campaign Manager 360. At the bottom of this article, you can find a list of the characters Campaign Manager 360 allows in landing page URLs. Expand all Collapse all Quantity and character limitsThis section provides the limits on the number of items that can be created in your Campaign Manager 360 account. Account level Advertisers: No limit. Advertiser level Advertiser groups: 300. Custom creative fields: 12 per advertiser. Floodlight activities: No limit. Event tags: See event tags below Audience: A list isn't targetable until it has at least 100 active members per month. Maximum number of members unlimited. Targeting templates: No limit. Landing pages: No limit. Landing page URL suffix: 128 characters. Placements: 200,000 (excluding archived placements). Accounts Name: 128 characters. Description: 254 characters. Subaccount name: 128 characters. Placement strategies: No limit. Placement strategy name: 255 characters. Content categories: No limit. Content category name: 255 characters. Event tags Event tag name: 255 characters. Event tag URL: 500 characters for impression or click event tag URLs. You can create:
You can apply:
Users User role name: 255 characters. User profile email address: 64 characters. User profile filters: 100 is the recommended maximum number of filters. In other words, we recommend you specify no more than 100 different advertisers, campaigns, sites, user roles, and Planning projects for any given user profile on the "Filters" tab. Floodlight Activity name: 100 characters. Activity group tag string: 8 characters. Default tags: 12,000 characters per tag. No character limit for the total across all default tags. Publisher tags: 12,000 characters per tag. No limit for the total across all publisher tags. Custom variable friendly name: 64 characters. Custom variable: 100 total variables.
The custom variable isn't set within Campaign Manager 360. It's a value that the advertiser's website passes to the Floodlight tag when the tag is served. Campaigns Name: 255 characters. We recommend not including semicolons in campaign names. External ID: 50 characters. Must use UTF-8 encoding. Allowed characters include: numbers from 0–9, uppercase and lowercase letters, dashes, and underscores. Never use commas, semicolons, or pipes ("|"). Comments: 255 characters. Landing page name: 255 characters. Audience segment group: 64 characters for segment name, 64 characters for group name. Placements Name: 512 characters. Package/roadblock name: 255 characters. External ID: 50 characters. Must use UTF-8 encoding. Allowed characters include: numbers from 0–9, uppercase and lowercase letters, dashes, and underscores. Never use commas, semicolons, or pipes ("|"). Comments: 4,000 characters. Additional key-values: No hard limit. However, we recommend that you don't exceed 512 characters. Ad assignments: 600 (excluding tracking ads). Ads Name: 255 characters. Comments: 512 characters. Custom landing page URL: 1,024 characters. Audience list expression: 400 clauses per expression, 65 distinct lists per clause, 300 distinct lists across entire expression. Creative assignments: 600 (excluding tracking creatives). Creatives included in rotation: There is a limit to how many assigned creatives you can include in rotation in an ad. The limit depends on your rotation type.
Status does not affect these limits. It doesn't matter whether your assigned creatives are active or inactive. It's important to remember the difference between assignments and rotation. You assign creatives with the "Edit assignments" workflow in your campaign (or in the ad properties). But you include creatives in rotation in a separate column. Once your creatives are assigned, check the "Include in rotation" column. You can find this column in your campaign or in the ad properties (under "Creative assignments"). Here you can choose whether to include each creative in rotation. Creatives Name: 256 characters. Creative name: 256 characters. Asset filename: no character limit. Assets of Instream or VPAID Linear creatives: 20 (including publisher hosted assets). Creative group name: 255 characters. Creative exit event name: 256 characters. Creative field name: 255 characters. Creative field values: 768 values. Redirect and display redirect creative URL: 255 characters. Rich Media Custom landing page URL in a rich media creative: 1,024 characters for landing page URLs entered directly into the Campaign Manager 360 UI. Hard-coded URLs in a rich media creative have no character limit. Sites Site name: 128 characters. Placement tag fields CC (when using Campaign Manager 360 to notify publishers about tags): 64 characters. Channel groupings for Multi-Channel Funnels reports Custom channel groupings: 25 groupings maximum. Rules per custom channel grouping: 50 rules per grouping. Custom audience list rules 2048 characters worth of custom rules total for each audience list. Special characters in landing page URLsIn landing page URLs, Campaign Manager 360 supports English alphanumeric characters in upper and lower case, as well as the following special characters: - _ . ! ~ * ( ) % # ; / ? : @ & = + $ , \ " [ ] { } | ` ^ ' Keep in mind that some of these characters have particular meanings in the HTTP protocol, which is why they are okay to use in Campaign Manager 360. If you use unsupported special characters, your ad may may not click through properly, or it may not serve at all. Requirements for %Your landing page URL can only include If you need to
use Creative encodingAll creatives uploaded to Campaign Manager 360 must be UTF-8 encoded. Next: Manage landing pages Was this helpful? How can we improve it? How do I turn off character limit 256?Go to Windows Start and type REGEDIT. Choose the Registry Editor. In the Registry Editor, navigate to the following location: at HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem.. Right-click the newly added key and choose Rename.. Name the key LongPathsEnabled.. Press Enter.. Why does the 260 character path length limit exist in Windows?The 260-character path limit is due to fixed buffers in the runtime library for DOS/Windows path processing (e.g. ANSI <=> Unicode, working directory, and DOS<=>NT path conversion).
Why is there a 255 limit?The limit occurs due to an optimization technique where smaller strings are stored with the first byte holding the length of the string. Since a byte can only hold 256 different values, the maximum string length would be 255 since the first byte was reserved for storing the length.
What is 260 character max path limitation?In the Windows API (with some exceptions discussed in the following paragraphs), the maximum length for a path is MAX_PATH, which is defined as 260 characters. A local path is structured in the following order: drive letter, colon, backslash, name components separated by backslashes, and a terminating null character.
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